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Summary: This post shows how to access a WD hard drive that's not recognized by Mac. To avoid data loss when fixing the unrecognized WD external hard drive, you can recover lost data from the WD hard drive for free with iBoysoft Data Recovery for Mac.
Aug 08, 2014 Re: WD My Passport for Mac won't mount on my Mac Pro in response to Phyllis Ormsby. HI, I have a some what similar problem. I am afraid the drive is in big trouble. In the middle of copying files, I accidentally unplugged it. Now it WILL NOT MOUNT! It shows up in disk utility and passes verification and repair with flying colors. Please help, I have asked friends and nobody can find a solution I have a Western Digital “My Book” external hard drive that will not mount to MAC or PC machines.Using Mac Book Pro. OS X 10.6.4 Immediately after connecting the external HD, I get a pop up window that reads, “The disk you inserted was not readable by this computer.” I am have used Firewire 800 port & USB. I'm trying to access some files for a client on a Western Digital external firewire/USB drive on my MacBook Pro. The drive will not mount in Finder. The upper level drive shows up in Disk Utility, but the partition of the disk I would like to mount (the only partition on the drive) is greyed.
Just like Seagate external hard drive not recognized on Mac, WD hard drive not recognized is a question frequently asked by Mac users in Apple related forums. It happens to WD My passport, WD My Book, WD Elements and Easystore, etc.
If you are one of those who are wondering:
- Why Mac won't recognize my WD hard drive?
- How can I make the WD hard drive detected and work on Mac again?
- Can I fix this issue without losing my important data?
You are in the right place to make the WD hard drive recognized by:
- 1. Trying six quick checks and fixes
- 2. Checking if Finder allows connected external hard drive showing up
- 3. Updating related WD Apps with WD Discovery for Mac
- 4. Checking if the WD hard drive is password locked
- 5. Repairing the unrecognized WD hard drive with First Aid
- 6. Use WD Drive Utilities to check the unrecognized WD hard drives
- 7. Reformatting the WD hard drives when it's not working
First, See How Mac Recognizes a WD External Hard Drive
The process of Mac recognizing an external hard drive is a little complicated even though you can't see it. Specifically, when you plug a WD hard drive into a Mac computer, macOS would be notified. Then macOS will call all related hardware and software to read, recognize, and show this hard drive on the Desktop and in Finder, so that finally you can access your data on the drive on your Mac computer.
So, we usually simplify this process in 4 steps:
- The WD hard drive is supplied with power, so that Mac can detect this storage device.
- macOS reads partition information of the WD hard drive.
- macOS recognizes the file system of each volume.
- Users access data on the WD hard drive.
However, if any part of this process goes wrong, hard drive problems like Mac won't recognize your WD hard drive would occur. As a consequence, you can't access, copy, write to or transfer data stored on it.
Now, Fix WD hard drive not recognized issue on Mac
So, based on the process of Mac recognizing a WD hard drive, we need a thorough check to know which part makes the WD hard drive not working on Mac, and then fix it.
1. Try Quick fixes when WD hard drive is not recognized by Mac
A proper connection is the most basic condition that Mac can access the WD hard drive. Or else the external hard drive would not even show up in Disk Utility. When your Mac can't recognize an external hard drive, you can always do the following quick fixes at the very beginning.
- Make sure the WD hard drive is externally plugged into a wall outlet if it's a WD desktop hard drive like WD Elements Desktop and My Cloud.
- Connect the WD hard drive directly to the computer and do not use a USB Hub.
- Try a different USB cable and port for power and data supply, especially if the My Passport external hard drive is not showing up in Disk Utility.
- Try a different USB-C adapter to connect the WD hard drive if your Mac only has the Thunderbolt 3 port.
- Try to connect the WD hard drive with a different Mac computer to check if the WD hard drive can be recognized on that Mac.
- Try to plug the WD hard drive in to a Windows PC to check if the file system of the WD hard drive is not compatible with Mac.
The WD hard drive lights on but is not recognized by Mac still?
Wait! Do you allow your Mac to show the recognized WD hard drive in the Finder and Desktop?
2. Show the WD hard drive in the Finder and Desktop
Sometimes, you think WD hard drive is not recognized by Mac because the WD external hard drive isn't showing up on Mac, neither in Finder nor on the desktop. However, the fact is that the WD hard drive is detected by macOS but it is not set to show up on Mac.
In this case, you can show the WD hard drive by changing the preferences:
- Step 1: Go to Finder > Preferences > General, make sure the 'External disks' option is ticked. This will make the recognized WD hard drive show up on the Desktop.
- Step 2: Select Sidebar tab on the top, make sure the 'External disks' option under Locations is also ticked.
The WD hard drive is not working on Mac still?
Well, it seems that Mac really can't recognize the WD hard drive. We need to take advantage of some tools for further check.
3. Update incompatible WD Apps with WD Discovery for Mac
WD Discovery is a desktop software for Mac and Windows for delivering WD software, updates and notifications for WD external hard drives.
When WD hard drive is not recognized, you can download WD Discovery for Mac to update WD Drive Utilities, WD Security, WD Backup, etc. Possibly, your Mac doesn't recognize the WD hard drive because the WD software is not compatible with your macOS.
4. Check if the WD hard drive is password locked
If you are using WD hard drives like My Book Drive and it is not recognized by Mac now, you can check if the hard drive is password protected. macOS can't read the partition information and mount the volumes if the WD hard drive is password locked. You can download and install WD Security to unlock the WD hard drive if a password has been set to protect the hard drive.
The WD hard drive is not encrypted? Then the reason for Mac not recognizing the WD hard drive is that macOS fails to access the partition and file system information. It could be a problem when WD external hard drive used on PS4 extended drive but not recognized.
5. Repair the unrecognized WD hard drive in Disk Utility
Disk Utility is a built-in disk management and repair tool on Mac computers. When a WD hard drive is not recognized or not working due to inner disk errors, you can try to repair the unrecognizable WD hard drive with Disk Utility.
Note: If the WD hard drive is recognzied in in Disk Utility but not mounted, you can select the Mount option first then the WD hard drive will be mounted on the Desktop..
- Step 1: Go to Applications > Disk Utility.
- Step 2: Click 'View' and choose 'Show All Devices'.
- Step 3: Select the unrecognized WD hard drive from the sidebar.
- Step 4: Click on First Aid on the top. Wait while First Aid verifying and fixing possible errors of the WD hard drive.
If First Aid can't repair the external hard drive, or Disk Utility doesn't recognize the volumes of the drive, probably, the WD hard drive could be corrupted caused by bad sectors.
6. Use WD Drive Utilities when WD hard drives not working on Mac
WD Drive Utilities for Mac is a specialized utility for WD hard drives to run drive diagnostics (fix potential drive failures, slow disk performance, and bad sectors), Manage RAID configuration (For RAID supported models), Erase and format WD hard drives, etc.
If a WD hard drive won't work normally on a Mac due to bad sectors or other parameter errors, you can download WD Drive Utilities for Mac to have a diagnosis of what happens to your hard drive.
- Step 1: Install WD Drive Utilities on your Mac and then launch it.
- Step 2: Plug the unrecognizable WD hard drive into the Mac.
- Step 3: Click on 'Diagnose' and choose 'Run Quick Drive Test' to check the WD drive completely.
7. Fix the unrecognized WD hard drive by reformatting
If the unrecognizable WD hard drive can't be repaired by WD Drive Utilities, the file system of the WD hard drive might be seriously damaged or corrupted. In this case, you have to reformat or erase this WD hard drive. Before that, it's necessary to recover lost data from unrecognized WD hard drive with free hard drive data recovery software for Mac, like iBoysoft Data Recovery for Mac, to avoid data loss.
iBoysoft Data Recovery for Mac is professional in external hard drive data recovery on Mac. It supports Western Digital, Seagate, Toshiba, Samsung, and hard drives of other manufacturers. This data recovery software can recover lost data when hard drive is unrecognized, unmountable, unreadable, corrupted on Mac. Besides, iBoysoft Data Recovery for Mac can recover lost data from Macintosh hard drive, USB drives, Pen drives, SD cards, memory cards, CF cards as well as other storage devices.
Tutorial to recover lost data from unrecognizable WD hard drive with iBoysoft Data Recovery for Mac
Step 1. Download, install, and restart your Mac. Then launch iBoysoft Data Recovery for Mac.
To recover your important photos, videos, music, documents, emails from this unrecognizable WD hard drive, you can free download and install iBoysoft Data Recovery for Mac on your Mac.
Step 2. Scan for lost data on the WD hard drive.
When the data recovery software is launched, you will see your unrecognizable WD hard drive in the interface. You need to select this corrupted WD hard drive and then click the 'Scan' button to scan for data on this drive.
Step 3. Preview and recover files.
When WD hard drive is corrupted, you can't access your data on this drive. But you can use iBoysoft Data Recovery for Mac to preview the data on the drive, which will help you make sure your files are not corrupted before you finally click 'Recover' to recover them.
Tutorial to reformatting WD hard drive that is not recognized by Mac
- 1. Go to Disk Utility and select the unrecognized WD hard drive from the sidebar.
- 2. Click on Erase on the top.
- 3. Follow the instructions to finish the reformatting process.
![Mount Mount](/uploads/1/2/6/4/126495148/715687039.jpg)
After reformatting WD hard drive process finished, you will hopefully see the WD hard drive recognized and showing up on Mac correctly.
However, if the external hard drive is not showing up in Disk Utility at all, the great chance is that the WD hard drive is physically broken. As a result, Mac can't read and recognize it. In this case, we advise you to check if the serial number of the WD hard drive is still in warranty so that you can ask for a repair or replacement service.
WD provides no-limited warranty unless your WD hard drive was purchased from an authorized distributor or authorized reseller like Amazon. So, if your WD hard drive is dead for disk corruption, please free free to contact their support team for warranty status review and product replacement.
Conclusion
In the issue of WD hard drive not recognized, be it on Mac or Windows, data rescue should come first. This is also important when USB flash drives, SD card, or other external hard drives that are not showing up on Mac.
You can recover data from the unrecognized hard drive with free data recovery software like iBoysoft Data Recovery for Mac. Then, you can fix the error in different ways without worrying about data loss.
Summary: This post introduces 5 solutions you can try when you are unable to mount an external hard drive on your Mac. Also, to avoid further data loss, you can use iBoysoft Data Recovery for Mac to recover lost data from this unmountable external drive first.
After you connect an external hard drive to your Mac, if everything is working fine, the operating system will automatically recognize, read, and mount your external drive, as well as show it in the Finder and on the desktop.
However, if your disk gives up the ghost just like the users below, the external disk will not be showing up as normal. And if you check it in the Disk Utility, you will find your drive unmounted there.
'I was able to use my 3 TB external hard disk drive to backup my data last week. But now it doesn't mount after I migrate from Mojave to macOS Catalina. I dug around and tried a lot of stuff but still can't mount this external hard drive on my Mac. Can someone explain how to get this drive mounted so I don't lose the data?'
Why an external drive is not mounting on Mac?
There are numerous reasons for the external hard drive not mounting issue. The following are a few of the most common ones:
Hardware and connectivity issue
Most of the time, you can't mount your external drive on a Mac just because the connectivity is not in proper condition. This issue may be affected by a loose fitting, a broken USB cable, the wear on USB ports, etc.
Sometimes, such connectivity issues could make your external drives keep disconnecting, or much worse, it would make your external hard drive unmountable eventually. After all, it is essential to have a firm and tight connection.
Corrupted disk
Another possible reason for an unmounted disk may come from the problematic hard drive itself. Wonder how could it be? Well, it is possible that you're unable to mount a drive just because it is corrupted and unrecognizable by macOS.
You can recall if your external drive has experienced one of these things: an unsafe removal when you are transferring files, an improper ejection, a sudden power outage, or even a virus infection. If so, your disk might be corrupted and it should be the culprit that you are unable to mount your external drive probably.
Incorrect formatting of the disk
In some cases, an unsupported file system will make your external drive unmountable. It is reasonable because if your Mac can't even read your disk's file system, how can you mount and access this hard drive on your Mac? This factor may not be as possible as the other causes, but it does happen.
Unable to mount external hard drives on Mac, how to fix?
Even though the reasons for a not mounting disk are different from case to case, certainly there are some things you can do to fix this issue. The following are five effective solutions to the 'external hard drives won't mount on Mac' issue, and some of them are just basic checks.
Solution 1: Check and fix connectivity issues
The first thing you can do is to make sure that your disk is connected to your Mac properly.
If you are not sure if there is a problem with the USB port/hub, you can plug a working external drive in to a port/on a hub, unmount and eject it. Then plug the unmountable external hard drive into that port/hub.
Also, here are some things you can try.
- 1. Reconnect your external hard drive to your Mac and ensure that it fits the USB port snugly.
- 2. Connect the external hard drive to a different USB port or a different Mac.
- 3. Replace the USB cable or adapter in case that it was damaged or broken.
- 4. Connect it to a Windows PC and see if the storage device is powered on and working.
Solution 2: Check the file system of the external hard drive
Well, if you don't know exactly what file system your disk is formatted with while your external hard drive can't be mounted now, you can go to Disk Utility to have a check if it is formatted with an unsupported file system.
Remember that macOS is friendly with APFS and HFS+ and is in a neutral attitude with FAT, FAT32, and exFAT. However, it is a different story if you need to access and write to NTFS file system on Mac. By default, macOS only enables NTFS drive read support but disables write support. In this case, you can download a free NTFS driver for macOS to mount this external hard drive in read and write mode.
Still unable to mount the external hard drive on Mac? Then it should be some problems with the drive itself. Then you can go with the following solutions to troubleshoot this problem.
My Book Duo Won't Mount On Mac Os
Wait! Have you recovered your important data from this unmountable drive?
Before you go any further to fix this unmountable hard drive, you'd better make sure you have backed up your data on this drive to avoid data loss. The reason is that when your external drive won't mount, you lose the only access to all your files on this drive.
In this situation, if you have important files on the external hard drive, any operations on the drive could overwrite the original data and cause irreparable data loss.
Forget to back up before? You can also use Mac data recovery software like iBoysoft Data Recovery for Mac to recover lost data from the unmountable external hard drives.
iBoysoft Data Recovery for Mac is a free external hard drive data recovery tool that enables you to recover lost data from external drives, especially when a hard drive is unmounted, formatted, inaccessible, unreadable, or corrupted.
It's fully compatible with macOS Big Sur 11/Catalina 10.15/Mojave 10.14/High Sierra 10.13/10.12 and Mac OS X 10.11/10.10/10.9/10.8/10.7. In addition to external hard drive data recovery, it also can recover lost data from internal Mac hard drives, USB flash drives, SD cards, memory cards, pen drives, etc.
Tutorial to recover lost data from unmountable external drive on Mac with iBoysoft Data Recovery for Mac
- 1. Download and install iBoysoft Data Recovery for Mac on Mac, and then restart the computer.
- To use iBoysoft Data Recovery for Mac, you need to install this software on your Mac. You can just download the installation package and install it with no fuss.
- 2. Launch iBoysoft Data Recovery for Mac.
- After successfully downloading this program on your Mac, you can drag it to your Applications folder to install it, or you can double-click its icon to launch it.
- 3. Select the unmountable external drive and click Scan button to scan all lost data.
- When the Mac data recovery software is launched, all connected storage devices will be listed in the interface. You can see the name, file system, and space allocation of your hard drives and partitions. Locate your unmounted external hard drive, select it, and click 'Scan' to scan for lost data.
- Two scanning modes are allowed: Quick scan and Deep scan. Quick scan mode saves time for users and is applied when data is recently deleted. Deep scan mode finds more files at the cost of more time, and it's used when file system is corrupted or partition table is lost. Anyway, this software will automatically choose the most efficient way to scan for files according to the disk condition.
- 4. Preview the searching results, choose files you need, and click Recover to get them back.
- With the preview feature, you can check whether your files on this unmountable disk are in a good condition or not. It saves time and money for users. The software will show if your file is corrupted so that you would not waste energy to recover it or pay for this data recovery product.
- 5. Have a check to ensure you have got all lost data back.
Now you either have a copy of a data backup in hand, or have recovered your important files with iBoysoft Data Recovery for Mac. Therefore, you can go ahead to repair this unmounted external drive without worrying about data loss.
Solution 3: Repair the external hard drive with Disk Utility
When an external hard drive is not working properly, you can use the built-in disk repair tool - First Aid to check and repair disk errors.
- 1. Launch Disk Utility.
- 2. Choose the unmountable external drive on the left sidebar.
- 3. Select First Aid in the top center and click Run.
Solution 2: Repair the external hard drive with Terminal
Sometimes, Disk Utility may not function as desired. Fortunately, you can still try to repair the corrupted external hard drive with Terminal.
- 1. Go to Applications > Terminal
- 2. Enter: diskutil list (This will list out the available volumes).
- 3. Check the volume identifier from the table that appears.
- 4. Enter: diskutil repairVolume [diskvolume identifier]. For example, if the volume identifier of an external hard drive is disk2s, you should enter: diskutil repairVolume disk2s.
Solution 3: Reformat the external hard drive
If yourexternal hard drive can't be repaired with Disk Utility and Terminal, the file system of this drive might be seriously corrupted. The only way to fix this unmountable external drive is to reformat it.
Warning: Reformatting will erase all data on the external hard drive, so please make sure you have backed up important data.
- 1. Launch Disk Utility from Utilities.
- 2. Click the icon of the unmountable external drive on the left part of the window.
- 3. Click the Erase function on the top of the Disk Utility window.
- 4. Complete the related information (name, format, scheme), then click Erase button.
My Book Duo Won't Mount On Mac Desktop
Conclusion
My Book Duo Won't Mount On Mac Catalina
When you can't mount an external hard drive on your Mac, you can try the 5 methods introduced in this post. But no matter which solution you are going to try, to avoid data loss, you are always advised to back up your files or recover your data from this unmountable drive first with iBoysoft Data Recovery for Mac.
My Book Duo Won't Mount On Mac Osx
But if unfortunately, none of these solutions can make your hard drive work again, or your disk is not even detected or showing up in Disk Utility, then this drive might be physically damaged. Under this situation, you should send it to a local disk repair service and see if they can help.
My Book Duo Won 27t Mount On Macbook Pro
Good luck!