If you are facing an issue with MacBook pro external hard drive keeps ejecting itself randomly gets unmounted after some time automatically there is a simple fix and this happens for few reasons with the settings in MacBook pro and there is no issue with MacBook pro or something wrong with the external hard drive. Its frustrating when your external hard drive/disk keeps ejecting or keeps disconnecting automatically after sometime, lets see how to fix MacBook pro external hard drive keeps ejecting issue with simple steps by terminal by typing simple command.
How to fix MacBook Pro External hard drive keeps ejecting:
Step 1: Open your terminal
Step 2: type sudo pmset -g
Step 3: It will prompt you for your administration password, enter your administration password and press enter.
Step 4: All System wide power setting swill be displayed on your terminal.
Step 5: Now look for disksleep and check the value normally if your macbook pro external hard drive keeps ejecting means that your power settings or energy saving issues. If your value is 5 then after 5 minutes your hard drive will go to sleep in order to save the energy. If your hard drive goes to sleep in that case it will be auto ejected.
Step 6: Change the value of disksleep to high value so that your never sleeps
Step 7: To increase the disksleep value in terminal type sudo pmset -a disksleep 1410065408 and Press enter.
Step 8: To check whether the value is set type sudo pmset -g and press enter now the values will be set.
That’s it folks, once you increase the value of disksleep then your macbook pro external hard drive keeps ejecting.
Your external hard drive keeps unmounting from mac laptop is due to the power issues only.
If in your mackbook pro settings are set to sleep mode after 10 mins then hard drive goes to sleep mode and gets unmounted.
Yes, external hard drive keeps ejecting automatically unmounted when it gets into sleep mode.