Usually I click on the extended HD items when I want to remove it, and when given the choice to eject all, I click that and then remove the external drive. I don't have to reboot anything. Never have. It always works.



Originally Posted By: artie505
Originally Posted By: plantsower
8. Select Mac HD from Start up Disk and reboot. (Restart?). After I run Sierra Clone for several hours (or a day) and then remove Ext. HD, first? I don't normally have to pick a startup disk after I remove my Ext. Drive. But, maybe this is a special situation?

You can't remove your external before you reboot/restart, because it's the volume into which you're booted.

You've got to wait until you restart into your internal SSD, and the best way to get there is by setting it as your startup disc in System Prefs > Startup Disc.

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