May 09, 2017  Before any hard drive is accessible, we must find out the device label. This is easy, but very important. This is because external hard drives in Linux (unlike Windows and Mac) do not automatically start up so that users can access files. To find out the label of an external hard drive, open up a terminal, and use the following command. May 13, 2013  That’s all there is to it. You’ll notice the drive is no longer accessible in Finder, but it will still be visible through diskutil from the command line, or the more familiar Disk Utility app in Mac OS X’s GUI. How to Mount a Drive from the Command Line on Mac. If you can unmount a drive, of course you can mount or remount one too. IExplorer can turn your iPhone, iPod, or iPad into an external hard drive and allow you to mount any of its directories into Windows Explorer or Finder where you can transfer files and make changes like any other USB drive. Feb 08, 2020  How to Partition an External Hard Drive on Mac. If you want to create multiple partitions on your external hard drive (in fact, you should for better file organization), here’s a step-by-step guide: Step 1: Highlight your drive and click “Partition” in Disk Utility. Open the Disk Utility app and highlight your external hard drive.

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Summary: This article analyzes why the WD My Passport for Mac drive is not mounting/working on Mac and how to fix this issue. If you worry about losing data from this hard drive, you can recover lost data with iBoysoft Data Recovery for Mac at first.

1. Nov 14, 2019  Most of the time, when you connect an external hard drive to your Mac’s USB port, you soon see it mount on the desktop. Apple likes to ensure these are easy to find, so they also appear in the Finder in the left-hand column under Devices, since Mac.
2. Apr 14, 2020  Give the external hard drive a name. Choose ExFAT as the Format. Choose GUIDE as the Scheme. After the external hard drive is completely formatted, you need to safely eject it and replug it back to the computer. The Mac/MacBook can mount and read the external USB hard drive successfully now.

Overview of WD My Passport for Mac hard drive

The WD My Passport for Mac hard drive is specially designed for Mac mini computers, iMacs and MacBooks. This trusted portable storage always offers quick and easy way to expand the storage space of your computer and to store a massive amount of photos, videos, music and documents. The WD My Passport for Mac drive comes in some amazing features like cloud storage, password protection with hard drive encryption, and compatiblity with Apple's Time Machine backup software. But the problem is that no matter how powerful this hard drive is, it is possible that this WD My Passport for Mac hard drive is not mounting on Mac computer.

Here is one typical case from apple.stackexchange.com:

My WD hard drive (WD My Passport for Mac) won't mount on my MacBook Air, not even in Disk Utility. I have 1 TB family photos on this hard drive, which are very precious for me. How to fix WD My Passport for Mac hard drive not mounting error? Any data recovery solution? Thanks a lot!

In fact, this is a common annoyance for many WD customers that the hard drive fails to mount in Finder or Disk Utility. If your My Passport for Mac hard drive is not working for the same reason and you haven't got an effective workaround to fix this unmounted drive on your Mac, check this page. You'll know why it happens and how to mount the Western Digital my passport drive to access it again.

Why is WD My Passport for Mac not mounting?

WD My Passport for Mac drives, including My Passport and Easystore, not mounting on Mac result from various factors. The reasons could be virus infection, internal file system errors, sudden power failure, sudden power outage, unwanted interruption during transferring data, etc. For all kinds of reasons, your Mac won't recognize this hard drive and thus this external hard drive won't mount. As a result, you can't open this WD My Passport for Mac drive nor access your important files.

How to fix the unmounted WD My Passport hard drive on Mac?

The connected WD My Passport drive should be automatically mounted on the desktop, in Finder and Disk Utility. When it won't mount on Mac as you expect, you can try these methods.

1. Show the mounted WD My Passport for Mac hard drive on Mac destop

Sometimes, the My Passport drive is recognized and mounted by the Mac, and you just don't see it. You can go to Finder > Preferences and confirm if the 'External Disks' under 'Show these items on the desktop' is selected. This will ensure if the external drives connected to this Mac are allowed to show on the desktop.

But if your WD My Passport drive is not even showing up, it's reasonable that you can't see it mounting on Mac. Then, you shoud check the connections and some hardware issues.

2. Mount the WD Mac hard drive in Disk Utility

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You can go to Utility and see if this hard drive appears in the left sidebar. If your WD My Passport for Mac drive for Mac is not mounting but grayed out in Disk Utility, you can right-click and select the 'Mount' button to mount it manually. However, if this external hard drive is corrupted, the 'Mount' button will not be available and you need to try the next solution.

But sometimes, you can't mount a hard drive on Mac because of internal disk errors like file system corruption, partition table lost, the directory is corrupted, etc. You WD My Passport for Mac drive won't be recognized by your Mac in these cases. Fortunately, you can fix the hard drive not mounting issue with the native disk repair tool, First Aid.

3. Run First Aid to fix WD My Passport for Mac not mounting error

First Aid is a Mac built-in tool to verify and check minor problems of a hard disk. Whenever you have troubles with a hard disk, First Aid should be a good disk repair tool.

Step 1: Go to /Applications/Utilities/Disk Utility/, then click Continue.

Step 2: In the sidebar, select the not mounting WD My Passport for Mac hard drive.

Step 3: Click the 'First Aid' button.

Step 4: Click Run.

If Disk Utility reports that the WD My Passport for Mac hard drive appears to be OK or has been repaired, you're done. Otherwise, this WD My Passport drive has been corrupted. You have to retrieve your data from this corrupted hard drive as soon as possible.

When those methods didn't make any difference and the WD My passport for Mac hard drive is not mounting still, you need to check some hardware issues that get involved in the disk connection.

Let's start with some basics factors.

4. Check the power supply of the WD My Passport for Mac drive

It's well known that insufficient or no power supply in USB ports could also lead to hard drive not mounting issue. Therefore, you should make sure the WD My Passport for Mac hard drive is getting the appropriate power. If the drive came with a Y-cable, use both USB connectors. Moreover, do not connect the drive through a USB hub, connect it directly to the Mac. Make sure the power adapter is connected directly to a wall outlet, not to an extension cord.

5. Check the USB cable

When external hard drive is not showing up on Mac, ensure the cable is properly connected to both the drive and computer. Then try connecting your WD My Passport for Mac hard drive with a new USB cable if you can fetch another one.

6. Check the USB port of your Mac

If the problem still continues, try using a different USB port. Perhaps your Mac has two USB port - the back and front ones. Assuming the external hard drive is plugged in the front USB port, try to insert the drive to the back USB port.

7. Check for driver update

If the hardware seems to be OK, let's check the software that related to this disk problem - the disk driver. A driver is a software component that allows the operating system and a device to communicate with each other. If your driver files go missing, outdated, or turn corrupted due to any virus invasion or invalid operation, the WD My Passport drive will be not working, and the external hard drive won't mount on Mac.

Step 1: Click the Apple icon and select 'App Store…'

Step 2: Click Update (NOT UPGRADE!) to install a specific update or Update All to install all available updates.

Sometimes, WD My Passport for Mac driver, software, and WD disk tool are needed, especially when you want to open a WD My Passport for Mac drive that is locked. You can go to WD official website and download software for WD My Passport troubleshooting and for WD My Passport driver update.

How to fix WD My Passport for Mac hard drive not mounting error without losing data?

However, if WD My Passport for Mac hard drive still won't mount on Mac, the last solutions is to reformat the hard drive. But reformatting will delete all data stored on the hard drive, and most of the time, many important files are stored on the WD My Passport for Mac hard drive.

If you haven't backed up important files, how can you recover files from the WD My Passport drive? It's high time to recover lost data from the unmounted hard drive first.

Step 1: Recover lost data from unmountable hard drive with iBoysoft Data Recovery for Mac

As for Mac data recovery, iBoysoft Data Recovery for Mac is highly recommended as it's a free Mac data recovery software. It can easily recover lost data from unmounted WD My Passport for Mac hard drive. This software can recover lost data from corrupted hard drive, unreadable hard drives, formatted hard drives, unrecognized hard drives, unmountable hard drives, inaccessible hard drives, and recover lost data from uninitialized hard drive. You can use this hard drive data recovery software on macOS Catalina 10.15/Mojave 10.14/High Sierra 10.13/10.12 Sierra and Mac OS X 10.11/10.10/10.9/10.8/10.7.

1. Free download and install iBoysoft Data Recovery for Mac.

2. Launch iBoysoft Data Recovery for Mac and select the unmounted WD My Passport for Mac hard drive.

3. Click 'Scan' to search for all lost files on this drive.

4. Preview the listed scanning results, choose files we want, and click 'Recover' button to get them back.

Hopefully, you'll get all your files off after the WD My Passport is not working nor mounting.

Step 2: Fix WD My Passport for Mac drive not mounting error by reformatting

After getting lost files back, you can fix WD My Passport for Mac hard drive not mounting error by reformatting without worrying about losing data. This will reset the WD My Passport hard drive.

1. Launch Disk Utility from Utilities.

2. Select the unmounted WD My Passport for Mac hard drive on the left part of the window.

3. Click the 'Erase' on the top of the Disk Utility window.

4. Complete the related information (name, format, scheme, etc.), then click the 'Erase' button.

Conclusion

This article mainly talks about a WD My Passport for Mac hard drive not mounting issue, analyzing why this issue occurs. When WD My Passport for Mac is not working or corrupted, you can repair this disk error without losing files on this drive by the assistance of iBoysoft Data Recovery for Mac.

For any questions or suggestions, please email us below.

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.

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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. Here are some things you can try.

• Reconnect your external hard drive to your Mac and ensure that it fits the USB port snugly.
• Connect the external hard drive to a different USB port or a different Mac. 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.
• Replace the USB cable or adapter in case that it was damaged or broken.
• 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. You can try the following solutions to troubleshoot this problem.

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 afree 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 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

Step 1: Download and install iBoysoft Data Recovery for Mac on Mac.

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.

Step 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.

Step 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.

Step 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.

Step 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.

Step 1: Launch Disk Utility.

Step 2: Choose the unmountable external drive on the left sidebar.

Step 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.

Step 1: Go to Applications > Terminal

Step 2: Enter: diskutil list (This will list out the available volumes).

Step 3: Check the volume identifier from the table that appears.

Step 4: Enter:diskutil repairVolume [diskvolume identifier]. For example, if the volume identifier of an external hard drive is disk2s, you should enterdiskutil 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.

Conclusion

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.

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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.

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Good luck!