Why is there a "MobileBackup" on my Mac?
Suddenly there is a NEW item on my computer: a "MobileBackup" that is a Time Machine backup, but is not listed as an ejectable item! This started a month ago, but I just noticed! What is it? How do I stop it? I can't find any information on it in Support. . Is my computer backing my data up somewhere online? How is that possible? I NEVER set that up.
HELP
MacBook Pro (15-inch Early 2008), Mac OS X (10.7.5)