- DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC HOW TO
- DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC FOR MAC
- DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC MAC OS X
- DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC MAC OS
While this won’t help you in your current predicament, there is a simple bit of advice you can follow to help avoid data corruption: always disconnect your drive safely. There are too many to cover here, but our sister site Macworld UK outlines theīest data recovery apps for those interested. These are generally paid apps, but they could restore your external drive depending on the issue. If all else fails, you’ve always got the option of using a third-party data recovery app.
DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC FOR MAC
Reformatting an external drive for Mac in more detail separately. Click Erase to confirm and start the reformatting process.Only fast external SSDs can utilise APFS formatting.
DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC MAC OS
If you want to use the drive across PC and Mac, we’d recommend ExFAT, but if you’re on macOS exclusively, we recommend Mac OS Extended (Journaled). Enter a new drive name and select the new format.Select the external drive from the list on the left.Plug your external drive into your Mac.When you’re ready to reformat the drive, follow these steps: We’d recommend using a PC to transfer files prior to reformatting the drive for use with Mac where possible. The good news is that it’s easy to change the format – the bad news is that doing so will completely wipe the drive, deleting any previously-stored data. ExFAT: Upgraded version of FAT32 without file limits, compatible with PC, Mac and Linux.Ĭhances are that if your drive is recognised on PC but not Mac, it uses the NTFS file format.FAT/FAT32: Older file format limited to a maximum 4GB file size, but compatible with PC, Mac and Linux.APFS: File format introduced in macOS Sierra, not compatible with PC.Mac OS Extended: Pre-Sierra file format for Mac, not compatible with PC.NTFS: Default file format for Windows PCs, not compatible with Mac.For those unfamiliar with data formats, there are several popular options: If your external drive appears when plugged into a PC but not your Mac, chances are that the drive’s formatting isn’t compatible with macOS. But before trying this method, make sure that the recovery drive is located in the drive (a separate copy of os installed on it).Once repaired, you should be able to access your external drive as normal. This fix has worked for many users, so there are high chances that this will work for you as well. Fix “Couldn’t Unmount Disk” Error with USB Boot Drive If the issue is still there, then assume that the error is caused by modifying the bootable disk. Once the process is finished, check if the issue has resolved. Or go to Erase in order to format the disk. Step 3: Visit First Aid and try to repair the disk. Step 2: A boot menu will appear, here, select to choose “Disk Utility”. Step 1: Restart your Mac while pressing and holding the Option key, and then select to choose Recovery partition.
DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC HOW TO
If that’s not the case, this fix is worth trying, here’s how to resolve the error with the recovery partition: Mind you, this fix will not work if the error was caused by modifying the bootable disk while creating a partition or formating. Fix “Couldn’t Unmount Disk” Error with Recovery Partition
DISK UTILITY VOLUME COULD NOT BE UNMOUNTED MAC MAC OS X
Let there be any Mac OS X version as it doesn’t matter (assuming 10.7 to 10.14 and above), this error can be easily resolved only if Disk utility is present on the drive.Īnyways, let’s head towards the actual fixes. Keeping the fact in mind that Disk Utility able to execute from the external drive, we can use it to boot Mac from another bootable drive. Good thing is that a valid solution is available that will help us to resolve the “Couldn’t Unmount Disk” Error on Mac. SEE ALSO iTunes Not Showing Album Artwork? Here's how to fix it.