Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

Cvadh387

macrumors member
Original poster
May 22, 2012
41
0
California
I am about to upgrade to Mountain Lion. I have already backed up my stuff with an external hard drive using Time Machine. Do I need to to keep my external hard drive plugged in while I am upgrading to Mountain Lion? Thanks in advance for all your help!
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.