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#Could not unmount disk macbook air pro
#Could not unmount disk macbook air mac

#Could not unmount disk macbook air pro

Suppose the "MacBook Pro couldn't unmount disk" issue persists proceed with other solutions below. To learn more about the process, you can open Activity Monitor and sort the PID number to find them.

You can also force kill the process by executing the following command.

(Replace PID with your PID number.) sudo kill PID

Type in the following command and hit Enter.

Launch Terminal from the Applications > Utilities folder.

#Could not unmount disk macbook air mac

To test whether your external hard disk is failing, you can plug it into your Mac and check its S.M.A.R.T status in Disk Utility with the steps below: But if your drive opens to empty folders or files, gets frozen on Mac, or reacts incorrectly in other ways, it may have hardware problems. If your iMac, MacBook Air, or MacBook Pro couldn't unmount disk, it more likely results from the drive being occupied by other running processes rather than a hardware failure. Fix 'couldn't unmount disk 69888' on Mac when erasing or partitioning an external disk If you see the error "Couldn't unmount disk.: (-69888)" or "Error: -69888: Couldn't unmount disk" on Mac, it usually means that you are trying to reformat, partition, or delete a volume or disk but can't because the operating system won't allow it due to the volume/disk currently being used by other applications or processes, or hardware failure. What to do if you can't unmount an NTFS drive on Mac? Fix 'couldn't unmount disk 69888' on Mac when erasing or partitioning an internal disk Guide to the error "couldn't unmount disk" on MacBook Pro and other Mac models: Here, we will analyze the error and help you resolve "couldn't unmount disk" on Mac with practical solutions.

The "couldn't unmount disk" error usually comes in two forms: it reads "Couldn't unmount disk.: (-69888)" in Disk Utility and "Error: -69888: Couldn't unmount disk" in Terminal. The error occurs when you fail to erase, partition, or delete an internal or external disk or volume on Mac, including an external hard drive (SSD or HDD), USB flash drive, Time Machine backup disk, an internal fusion drive, etc. " Couldn't unmount disk 69888" is one of them, in addition to " Unable to unmount volume for repair.: (-69673). The inability to unmount a disk on Mac can cause various errors.