Connect the hard drive to a different USB port or a different Mac. Reconnect the USB connector or adapter to fit the hard drive snugly. Fix External Hard Drive Connectivity IssueĮnsure proper connectivity of your external hard drive to your Mac. For MacBook Air, MacBook Pro, or MacBook with non-removable battery-press and hold Shift + Control + Option + Power Button for 10 seconds.ģ. For iMac, Mac Pro/mini, or laptop with a removable battery-detach the power cable or take out the battery then press and hold the Power button for 5 seconds. SMC (System Management Controller) Reset on your Mac. Restart Mac then immediately press and hold Option + Command + P + R keys until you hear a second chime. NVRAM (Non-volatile RAM) & PRAM (Parameter RAM) Reset. Your Finder sidebar will now show the external hard drive. Under the Locations section, select the “ External disks” checkbox. Your Desktop will now show the external hard drive icon. Under the “Show these items on the Desktop” section, select the “ External disks” checkbox. On the “Finder Preferences” window, click the General tab. From the top Menu Bar, go to Finder > Preferences. Change macOS SettingsĮnsure Finder preference to show external disks on Desktop or Finder is enabled. 
Methods to Fix the External Hard Drive Not Mounting on Mac Issue 1. The contained files and the external drive’s integrity comes to a stake.ĭon’t worry, read and apply the below fixes to resolve Mac unmounted external drive issue. Consequently, data inside the unmounted external hard drive turns inaccessible.
But sometimes the external drive won’t appear on any of these places. When you connect an external hard drive on Mac, it will show up on Desktop, Finder, and Disk Utility. Recover Data from Non-Mounting External Mac Hard Drive Fix External Hard Drive Connectivity Issue Methods to Fix the External Hard Drive Not Mounting on Mac Issue.
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