


First, See List of External Drives Connected to your Mac using the command:- diskutil list and Hit the Return to Run command.So fix using the Terminal Command, 1) Open Terminal on Mac, 2) Type Below commend. Your External Drives is mounted, and your Mac Goes sleep or Power down, So your Drive is not unmounting successfully, So when you Re-plug or use after Restart your Mac, Your external disk not mounting mac.Repair External Drive using First Aids Option under Disk Utility window.Change or use an Alternate USB Port on MacBook or Mac.Sometimes Drive does not appear on the desktop, so you should check for a disk in the left frame of finder Windows and under the ‘’ Devices’’ heading. However when you find that your Mac doesn’t recognize an external drive then different thoughts come to mind like the drive is corrupted or crashed. We all have some important stuff like backups, documents, movies, and many more things stored in the external drive. But when “ external drive is not showing on the desktop” or “ Not Mounting External Drives on Mac“, MacBook Port, then it is frustrating cause you can’t copy or post anything on your Mac internal drive. Usually, when we connect the external drive to Mac, it shows up quickly on the desktop. Solution 8: You consider Replacing your Drive.Solution 7: Check the Power of your Hard disk.Solution 5: Mac is not formatted to show external drives.Solution 3: Incorrectly formatted USB drive.Solution 1: Faulty USB Cable of your hard drive.How to Show Connected Devices in Finder.Resolve Mac Doesn’t Recognize External Hard Drive on the latest macOS.
