If you are using a file system other than Mac OS Extended (HFS+) like APFS or FAT32, backup your data, format the drive using Mac OS Extendend and test it again.If you have encrypted the drive, decrypt it and test it without encryption.If available, run First Aid to check your disk for problems.Go to Applications > Utilities and open the Disk Utility.Add the external drive to the privacy list.On your Mac, go to Preferences and open Spotlight.If you are using a laptop, you might have to do this twice, once for Power Adapter and once for Battery, depending on when the problem occurs.Disable the option to put hard disks to sleep when possible.
#My passport for mac stuck on encrypting how to#
Following are some tips on how to troubleshoot such an issue: There could be different reasons why an external drive suddenly disconects, so if possible, it's best to try and narrow down the problem by testing different configurations and settings. Why does my drive disconnect from my Mac? FAQ - Frequently Asked Questions - Knowledge Base