Disk Utility First Aid Failed External Hard Drive

The new Disk Utility now refers to the physical drive connected to your computer (internally or externally) as a 'physical disk. However, the drive has clearly become corrupted - running first aid in Disk Utility throws up a 'could not read boot block - input / output error' along with some further info. Think you have a specific problem with your internal drive or with external devices for storage? What you can do is to utilize the First Aid element of Disk Utility in order to check it. Click the button to “Repair Disk Permissions. Repair Disk Permissions. Because you've booted the system from the Recovery HD volume, you can repair problems with your start-up hard drive. If it fails, the only alternative is backing up your data and getting a new disk. It helps to verify and repair a range of issues related to startup HD and external drive problems. The external hard drive itself, under normal circumstances, should be detected by your operating system, without the need of drivers, software, or firmware updates. Got a MacBook here with an external hdd on firewire in an Xcraft enclosure. And we are unable to open and read the BitLocker protected USB thumb drive on MacBook directly. If Disk Utility tells you the disk is about to fail, back up your data and replace the disk—you can't repair it. Ariolic Disk Scanner. After that, go to “First Aid” and verify the disk. Also Paragon might not be the best tool for the job. Access Disk Utility from the appeared Boot menu (however, if you use Installer disk, go to Utilities menu and click Disk Utility option). The drive should say unallocated; Note: If it does not you will need to right-click and delete the volume first. Then, click the button [ First Aid ] at the top and then click [ Run ]. I am trying to partition the hard disk to accommodate an older MacOs version that can run only when needed. Also, if you haven't yet contacted Seagate to see if they've got any advice, it might be worth a shot. Create a Mac OS 9 boot disk containing Disk Copy, the accompanying scripts folder and Cleanup for ASR. Related Documents. All the magic begins once you hear the startup chime. How to Open Disk Utility on a Mac. Secondly, Repair the unmounted Macintosh HD in recovery mode. Fix external drive that is not showing up on Mac. You may also try a cloning application and verify if the clone tool shows your hard drive. In the disk info section at the bottom, the following telltale appeared: “Partition Map Scheme: Unformatted”. Disk Utility in macOS' Recovery Mode. Repair the failed Mac hard disk or SSD. Disk utility error fix. However, Disk Utility might prompt you to erase the drive, which will remove all drive's content. Cancel External USB GUID Partition. Fixed Erase Process Has Failed on macOS High Sierra Mukhtar Jafari 7 Comments 0 In this article, I'm going to show you how to fix Erase Process Has Failed during Partitioning macOS High Sierra hard drive on Disk Utility. It seems to work OK, but I ran Disk Utility First Aid and it said that the First Aid process has failed and to backup the volume if possible. In that click repair disk and repair disk permissions. Click Repair Disk to fix the errors on the external hard drive. exFAT support on macOS seems to have some bugs because my external drives with exFAT formatting will randomly get corrupted. Use the disk utility tool built in. Boot from USB Drive. Click the Show details to view. If your drive is having problems and you become aware of this before the machine crashes, or if you manage to get it up and running again (or in the case of an external drive your Mac is able to detect it), the first thing to do is launch Disk Utility. Always backup your data before running First Aid scans of your hard drive. For instance, Mac's Disk Utility is an excellent option to repair a hard drive malfunction scenario. Tried disk repair, tried First Aid. " Disk Utility was unable to repair my drive and suggested I reformat the. On Mac OS X, we can do that by running First Aid the drive or partition. How to verify and repair your hard disk in OS X Hard disk maintenance is one of the few regular maintenance routines that I recommend people do for their Macs. So, I restarted my Mac and went to Recovery Mode by press-holding Command + R. What I would do is to get your instal disk and boot up holding down the c key on your keyboard. To get to First Aid: Click on the partition to select it. 3 Run First Aid on External Hard Drive. The Disk Utility interface is the same one you'll see on your Mac OS X desktop, but run it from here and it'll be able to repair problems with your system drive. Recovery Mode makes it easy to repair your Mac's disk in situations when the machine won't boot properly and load the desktop in the first place. The tool support RAW hard drive data recovery professionally. From here, I ran Disk Utility's First Aid. Now click on Disk Management on the left hand side. Step 2: Then, Highlight the greyed out volume. If Disk Utility finds it and you can run First Aid, if the result is that it repairs it, great! If it says it's unrepairable, again, it would be time to seek out a disk recovery service. Next, select Mac hard drive from the left-hand panel, go to the "First Aid" tab, and. Run First Aid in the Disk Utility application. Related Documents. In each case, the Mac can boot from the bootable backup as long as the hard drive is placed in the first bay of the enclosure. If this doesn't work, and you don't have a backup before, the safest way to get data off the dead MacBook Pro is using a professional Mac data recovery software. If not, go to Disk Utility and check to see if it appears under the heading External. Using the First Aid option, you can address problems with your hard drive and potentially repair a damaged or corrupted disk. From disk utility clicking on mount & first aid. I can't imagine the hardware is actually damaged otherwise it wouldn't even recognize it (Right?). 1TB External Seagate hard drive appears in Disk Utility but I can't access it. To repair your Mac’s disk permissions, first with Disk Utility open, click on Macintosh HD as shown below (or whatever name you gave to that drive) and then, on the First Aid tab, click on the. What are some important feature of Disk Utility? First Aid - to repair file systems and file permissions. Data loss can be an absolute nightmare if you have no backup. Open Disk Utility at the OS X Tools menu, and select your external drive device (not the drive itself). Mount failed The disk “Macintosh HD” could not be mounted. Search in the list on the left and see if the USB drive appears there. Once you open Disk Utility, drives will be listed. If you receive this message from Disk Utility after replugging an external drive that wasn't successfully ejected (or unmounted), it could be that the OS is already busy performing the repair in the background. It seems to work OK, but I ran Disk Utility First Aid and it said that the First Aid process has failed and to backup the volume if possible. Sometimes, data present in the physical drives (Internal/External Hard disk, Pen Drive, etc. This computer can use up to three hard drives. 0 Crack software also retrieve data after formatting hard disk. If the hard drive still isn't playing ball, the next step is First Aid. 2) Click the First Aid. From what I understand, Windows doesn’t always like the way Mac’s do the formatting on some larger drives, though, so give it a try and if your Windows machines don’t like it, just format the drive with Windows. In the classic Mac OS, similar functionality to the verification features of Disk Utility could be found in the Disk First Aid application. Expert news, reviews and videos of the latest digital cameras, lenses, accessories, and phones. Still, if you are unable to find out the My Passport on the Finder or desktop, then we will look for the external drive from the Disk Utility. It works for a while and then stops being recognized. 3 Run First Aid on External Hard Drive. Per the Pegasus R4/R6 Compatibilty List available on the Promise Technology site, I purchased the following compatible hard disk: Toshiba DT01ACA100, 1 TB, 6 Gb/s transfer rate, 64 MB buffer size, 7200 RPM. You may add extra internal hard drives, if your Mac can accommodate them, or connect an external hard drive. Find helpful customer reviews and review ratings for WD 2TB My Passport Ultra Blue Portable External Hard Drive, USB-C - WDBC3C0020BBL-WESN at Amazon. Format USB on Mac using Disk Utility. Mac SSD not Booting? Try 5 Fixes to Boot up Your Mac where you’ll need to select “Disk Utility”. Does Readyshare not support multiple partitions on a single hard-drive or do I need to change something in my setup? When I connect the USB hard-drive directly to my MacBook, I can see and acess the 2 partitions. With the advent of OS X El Capitan , Apple made a few changes to how the Disk Utility First Aid feature works. Click on the partition tab, select 1 partition from the drop-down box. Pop up window will ask to verify the erase procedure. Q: I'm having trouble seeing my disk when connected via eSATA. Disk repair utility (Check Disk command) can perform an extensive scan on the hard drive and repair errors it finds during scanning. Please select Disk Utility and click on Continue. July 1, 2018 Title 30 Mineral Resources Parts 1 to 199 Revised as of July 1, 2018 Containing a codification of documents of general applicability and future effect As of July 1, 2018. On testing seems nothing can repair or reformat either Volumes or Drive DISK UTILITY First Aid on Drive "Error: Some information was unavailable during an internal lookup. Your hard drive's formatting is the structure used by the system to store and retrieve every file saved to the drive. If from CMD+R I choose "Disk Utility" and then "First Aid" it reports a warning about errors at boot, but cannot fix it from there. Go to First Aid tab. Select the disk you wish to copy in the list on the left-hand side of the main Disk Utility window. Once it has booted, it should show up as an external drive on the other Mac. They charged $1500 but they were able to extract some (though not all) files from the drive. You will now be prompted to the “Disk Utility”. It will look something like the orange icon below. If you have additional internal hard drives or external hard drives connected to your Mac, they too will be visible. I am running a Macbook Pro 13" i5 2011 and have run into some problems. Select the disk or volume in the list on the left panel. " Now the external drive is not mounted at all, but the light is blinking and it sounds like it is spinning normally. Select the disk and click on "VerifyDisk, Repair Disk, or First Aid" Proceed further after selecting any one of the options. If it fails, the only alternative is backing up your data and getting a new disk. Step #1: Go to " Disk Utility " from the Spotlight. The most easiest method you should try first is to use the fsck command-line tool from Mac OS X recovery to check and repair the consistency of the corrupted file system. In OS X Recovery, click the "Disk Utility" shortcut to launch the Disk Utility here. Then click the Mount button to mount it. Then, select “Show All Devices”. I can't imagine the hardware is actually damaged otherwise it wouldn't even recognize it (Right?). But this will at least determine if the drive is the part that failed. The data needs to be read as quickly as possible, and the HR department would like to maxmimize drive use as much as possible. I’ll use all three of those utilities you mentioned. This will check the disk for any errors on the disk that can be repaired. Connect your USB or other external drive and open up disk utility. Once it’s done, try to complete the same task again. I used to use Spinrite to fix this in the old. Boot from USB Drive. Follow these steps to run disk utility and help to fix the problem of external hard drive not showing up on Mac. First Aid Repairs File System Problems. The Recovery HD has quite a few useful tools available such as Disk Utility, Safari, A Download Link for OS X and the option to Restore from a Time Machine Backup. The "ntfs-data" partition was automatically detected and mounted. First try free and low cost techniques like connecting to another computer because the drive itself might not have been the component that crashed. Mac SSD not Booting? Try 5 Fixes to Boot up Your Mac where you’ll need to select “Disk Utility”. If it doesn't appear in the drive list at left of Disk Utility window, hardware is faulty (drive, case, USB port, or cable). A possible fix for invalid sibling links on a I ran Disk Utility and the Hard Drive where my OS X lives was mounted. The Disk Utility interface is the same one you’ll see on your Mac OS X desktop, but run it from here and it’ll be able to repair problems with your system drive. I could see it in Disk Utility (on both OS's). It helps to verify and repair a range of issues related to startup HD and external drive problems. In Disk Utility, click on the First Aid button, Click on Run to execute. Fix: The Disk You Inserted Was Not Readable by This Computer. Start by plugging in your drive. However, you might be able to check the S. Disk Utility's First Aid feature is able to verify the health of a drive and, if needed, perform repairs to the drive's data structures to prevent minor problems from turning into major issues. crack open the case and remove the hard drive and get a connector such as the Voyager from OWC (otherworldcomputing. Partitioning is relatively safe, but it always carries the risk that something could go wrong, and we could lose our data. Fix external drive that is not showing up on Mac. Disk Utility is sometimes unable to repair a booted drive - in this case, follow the next method. The most easiest method you should try first is to use the fsck command-line tool from Mac OS X recovery to check and repair the consistency of the corrupted file system. The system will boot into the floppy disk. Make sure the device can be detected by the machine. Step 2 Click Disk Utilities(Utilities) > Disk Utility. Then, click the button [ First Aid ] at the top and then click [ Run ]. Govind and Macintosh HD are volumes on the single phydical drive. First Method – Disk Utility. Step 2: Select your external hard drive and then select first aid option. try the drive on a friends computer. Perform the task to the disk. Third, fixed your Macintosh HD not mounted by the terminal. Follow these steps to run disk utility and help to fix the problem of external hard drive not showing up on Mac. 2) Click the First Aid. Run First Aid in the Disk Utility application. I forced it back online with promiseutil, but it seems no data gets copied onto it (even though the whole array, logical drive and physical drives show as 'ok'). You may add extra internal hard drives, if your Mac can accommodate them, or connect an external hard drive. I'm having a whole world of issues with my 8610 of late--but I don't know if it's related to the printer showing up as if it were a HD on Disk Utility. Before continuing through any troubleshooting tips mentioned below, the first thing to do is backup up all your data from your Mac hard drive to ensure that it’s safe. Fourth, run FSCK command in single-user mode. First Aid on recovery mode can serve as a computer flash drive repair tool on Mac. Open Disk Utility from the macOS Utilities window; Select your hard drive or SSD from the sidebar. Select Run to proceed the first aid diagnostics. Based on the first reason above, you need to kill the potential viruses. Turned the power on, no unusual noises but the icon isn't showing up on the desktop. The first volume (parts 1-99) contains current regulations issued under subtitle A—Office of the Secretary of Transportation; the second volume (parts 100-177) and the third volume (parts 178-199) contain the current regulations issued under chapter I—Pipeline and Hazardous Materials Safety Administration (DOT); the fourth volume (parts 200. Follow these steps in OS X El Capitan or above: Open Disk Utility, which is in the Utilities folder within your applications folder. DIY Repair Liquid Damage A1466 MacBook Air 13" Logic Board - No Power Efi Chip - Duration: 34:51. It has the capability to detect and repair the damages to partition map, master directory block, device driver and so on. Result 1: Nothing is wrong or. But there are situations in which it may not be available. In that click repair disk and repair disk permissions. While most external drives connect via USB, some use FireWire, eSATA or Thunderbolt ports. I just upgraded to the new macOS High Sierra today(9/28/17) Prior to updating i decided to run a quick disk utility scan to make sure everything is fine on my internal hard drive for my Macbook Air. What are some important feature of Disk Utility? First Aid - to repair file systems and file permissions. Select your hard disk and then click the First Aid tab. For example, one of the drives I had plugged into my USB hub (which plugs into the USB-C port on the Mac) and it was not showing up on Disk Utility or anywhere. Run First Aid in the Disk Utility application. I have an older Seagate External Hard Drive and am wondering if there are any tools in Windows 10 that I can use to try to repair the external hard drive? This thread is locked. Otherwise, click Repair disk (if suggested) or try repeating the First Aid procedure until the result indicates that the hard drive is OK. , the startup disk, the volume where Disk Utility resides, a write-protected disk such as a DVD-ROM, or a disk that has. If Disk Utility reports that the disk appears to be OK or has been repaired, you’re done. Erase via Disk Utility. Prepare Your Drive. When I went to reinstall the OS, it asked for a disk to install it on and nothing would come up. So, I restarted my Mac and went to Recovery Mode by press-holding Command + R. 4 the Disk Utility menuitem in the installer has moved to the Utilities menu). Step 05 - Choose Mount. Step3: After this step, from the Boot menu access Disk Utility. 13 High Sierra with disk utility. In the sidebar, select a disk or volume, then click the First Aid button. This feature will check your startup drive for any errors, if detected click repair. This is typically the format used to create a clone of a hard drive and to distribute software. Disk Utility’s First Aid feature is able to verify the health of a drive and, if needed, perform repairs to the drive's data structures to prevent minor problems from turning into major issues. Another reason is, when you plug-in another external drive, Ubuntu will automatically create a directory in the /media and mount the system on that directory, which could probably have some side effects, as the /media directory would be your external drive. Using the First Aid option, you can address problems with your hard drive and potentially repair a damaged or corrupted disk. Use the CHKDSK Command. Just click the Apple logo in the top left corner of your screen and select Restart. The Recovery HD has quite a few useful tools available such as Disk Utility, Safari, A Download Link for OS X and the option to Restore from a Time Machine Backup. Just launch Disk Utility, select your drive, and click on the "First Aid" option to repair it. Microsoft has built in this utility on the OS copy you are using, i. I booted from the bootable volume, and ran First Aid from Disk Utility on the added volume. I'm aware that Windows can do a better job at repairing exFAT drives so I was hoping to fix it in Windows, either with Windows own disk repair tool or third party software. Failed to run First Aid from the recovery mode disk utility? No worries, then try out the following commands to fix the issue in few seconds. No response. Here, click on Repair Disk button to repair the volume. We needed to reformat the drive before we could copy the files. If your computer suffers from slow performance, and it often freezes, then most likely it is due to hard drive failure. Open Disk Utility at the OS X Tools menu, and select your external drive device (not the drive itself). How to diagnose a failing Mac hard disk. If you still get an error” Disk Utility can’t repair this disk” go to the next step. First Aid on recovery mode can serve as a computer flash drive repair tool on Mac. In [Disk Utility], select the target hard drive at the left pane. Will erasing the partition and reinstalling El Capitan affect my Bootcamp partition or ability to use Win 10? 3. Now click on Disk Management on the left hand side. External Drive Crashed, Now Read drive using any tools. We’ll go over how to perform hard disk repair on Mac using software solutions. Select it, select the "First Aid" tab, and click "Repair Disk". • Fantom Drives highly recommends that you regularly back-up the files stored on your Fantom Drives external hard drive. Time machine external became unmountable in (running El Capitan) but I also tried it on a different mac running Leopard (yes,) still didn't mount. There are 2 ways to fix the erase problem with your usb , sd, external hard drive and whatever you are trying to format. Otherwise, continue to the next step. If the Disk Utility can repair the disk, you will get a notification on the screen. Hard drive recovery using Disk Utility. Most internal hard disks connect to computer motherboards via SATA and PATA interfaces. If it doesn't appear in the drive list at left of Disk Utility window, hardware is faulty (drive, case, USB port, or cable). Step 3 Select the connected USB drive under External and click First Aid to run it. When I went to reinstall the OS, it asked for a disk to install it on and nothing would come up. If your Mac has an optical drive, you will see it as well. If the HDD does not appear in Disk Utility, buy a new one. The drive will show up in Disk Utility however using 'First Aid' under 'Disk Repair' proved futile. I have an external drive with two partitions: an encrypted partition for Time Machine, and another AFPS (Encrypted) one called "Extras". Be sure to back up the information you want to keep to an external device. It also fixes issues with regards to startup and of course, external hard disk drives. Open Disk Utility from the macOS Utilities window; Select your hard drive or SSD from the sidebar. When hard drive corruption occurs, your Mac may behave strangely (e. Symptoms: Known as "Blinking Light" problem. Now, click on First Aid Tab. Running 'Repair Disk' failed with: Disk Utility stopped repairing "Macintosh HD" Disk Utility can't repair this disk. I assumed that this would only erase the data and I went with the quicker, less secure method. My only guess on how to restore the lost hard drive space is the run DiskWarrior if you have it. And choose first aid to check your drive. You can check the health of your Seagate external drive by starting up Disk Utility. Step 2: Repair unreadable disk with Disk Utility. When you restore from one volume to another volume, an exact copy of the original is created. If you still get an error” Disk Utility can’t repair this disk” go to the next step. You'll see "First Aid, Erase, Partition, RAID. Step 05 - Choose Mount. Disk Utility confirms that this is a NTFS file system. grab an external hard drive. What I suggest is to use a bootable external drive to see if you can gain access to the hard drive and copy off your data and try to make repairs. Another reason is, when you plug-in another external drive, Ubuntu will automatically create a directory in the /media and mount the system on that directory, which could probably have some side effects, as the /media directory would be your external drive. Then you should attach it to your Mac manually. and then click First Aid. Disk Utility - First Aid process failing I've been running into issues with my iMac, such as random freezes and shutdowns at random times while doing completely different things. The stiction issue usually results from bumping or dropping. Disk Utility first aid will not do anything, it shows up as nothing being wrong with the drive unless I. Method 1 : Using inbuilt fsck "file system check" utility to fix the node structure. Note: If you’re using a new, external drive from OWC for the first time, notice the physical disk has a volume associated with it called “OWC Setup”. When the First Aid function completes, the resultant message will state that the hard drive is OK. I backed out of disk utility with Macintosh HD still showing up. Also when we buy a new USB or Hard Drive, it often comes with windows compatible not the mac so formatting it even needed in this case. First Aid checks the external WD hard drive for errors like the corrupt filesystem, corrupt partition, files stored on it are corrupt, bad sectors and fixes disk permissions. The disk "1 TB Hard Drive" could not be mounted. Turned the power on, no unusual noises but the icon isn't showing up on the desktop. After launching the app, you will have to select the USB drive, which has the issue. Back up as many of your files as possible, reformat the disk, and restore your backed-up files. 5, download and run the Repair Privileges Utility 1. Open the Disk Utility and choose "First Aid," then "Verify Disk. Recover data from wd external hard disk which is not detecting,not recognized,not working,corrupted,not showing up Windows 10 7 XP PC Bios device management. status as some other utilities, but it does show overall status. Now, the hard disk drive should be seen within the Finder Window under Devices. That's only possible if your disk can be saved by means of Mac's native app, Disk Utility. explained, when I run first aid I get the following message "problems were found with the partition map which might prevent booting. A clone, or bootable backup, is an exact copy of everything on your Mac's drive: system files and personal data. Tried disk repair, tried First Aid. However, this method is not nearly as useful or robust as a standard Time Machine backup. Mac troubleshooting: dealing with hard drive woes. Plug in your USB Flash Drive/External Hard Drive. If the drive has a file system not recognized by OS X, you’ll need to erase it and the format it using FAT or HFS+. Disk Utility is Apple's program to help repair and mount damaged drives. 37 TB is available which would suggest that the files are still on the drive. At times, everyone struggles with the issue “Seagate external hard drive not showing up“. If there is a sound that has never been heard from your disk, make a backup copy of it from the disk. Next, click the "Erase" button on the top of the window. Otherwise, continue to the next step. Solution 3: Open the USB drive on Mac High Sierra with BitLocker Genius. Click Run, then click Continue. In Disk Utility, the drive should show up in the left-hand column. First Aid: Verify and Repair HFS+, APFS Drives with Disk Utility Tuesday, May 22nd, 2018 | Author: Tom Nelson. Also when we buy a new USB or Hard Drive, it often comes with windows compatible not the mac so formatting it even needed in this case. Notify the person who’s hard drive you are formatting of this! 1. Run First Aid first. Disclaimer: While performing chkdsk on the hard drive if any bad sectors are found on the hard drive when chkdsk tries to repair that sector if any data available on that might be lost. Data loss can be an absolute nightmare if you have no backup. First Aid will check the hard disk for errors and repair it if necessary. So, you launch Disk Utility to check this drive, only to find that the external hard drive greyed out in Disk Utility. You can then use other Mac to secure erase the disk on the iMac. It'll check the drive for errors, repair them, and recheck if it deems it necessary. Repair corrupted hard drive using disk wipe software Now, if the inbuilt Windows tools can’t help you then third-party disk wiping tools are your only rescue in the process to fix hard drive. Solution 3: Open the USB drive on Mac High Sierra with BitLocker Genius. Click Done when it is finished. Once you're in the folder, click on the disk that you're having problems with and run First Aid. ⑤ Once in Recovery mode, you can select your startup drive and click Repair Drive (circled). If your Mac has an optical drive, you will see it as well. SysTools Hard Drive Data Viewer Pro 10. 3)Failure to eject external hard drives and related storage devices before disconnecting them or powering them off. If you're able to select the drive in the left-hand column, highlight it and click on "Repair Disk" under the "First Aid" tab. Once you have. ) If hard drive throws a "Partition Failed" error, then move to Single User Mode and follow the steps mentioned below. You should now initiate a normal restart to see if your problem has been resolved. When external hard drive infinite loading problem happens in Windows 10/8/7, if you have saved many important files on this disk, the first thing you should do is to restore data from the target disk. You'll notice that this drive is within a mdadm RAID array. , the startup disk, the volume where Disk Utility resides, a write-protected disk such as a DVD-ROM, or a disk that has. Step 2: Select your external hard drive and then select first aid option. If the drive is showing here, but not on the OS X desktop, then click First Aid to try and repair the drive. I updated WD Drive Utility and it can find the external hard drive, but says that it is "unmounted. Govind and Macintosh HD are volumes on the single phydical drive. 5, download and run the Repair Privileges Utility 1. If the disk is visible in Disk Utility but it did not mount, select the disk and click on First-Aid. If you receive this message from Disk Utility after replugging an external drive that wasn't successfully ejected (or unmounted), it could be that the OS is already busy performing the repair in the background. You’ll see a screen like the one below. I thought I narrowed down the problem to a USB hub, but it crashed on me again the other day. ' The disk space you create and work with is now referred to as a 'physical volume', even though technically the volume is a digital or 'logical ' entity, not a physical one. First Aid in Disk Utility is a Mac built-in tool to detect and repair hard disk. ⑤ Once in Recovery mode, you can select your startup drive and click Repair Drive (circled). A drive failed on my Pegasus R4. Finally, If you still can't find external drive on Mac, it indicates that either your device is broken or it is formatted using the system which is unreadable for Mac.