Actually, many Apple upgrades have a side effect of turning it back on, so I end up giving it another shot whether I want to or not every few months. Both my M

Actually, many Apple upgrades have a side effect of turning it back on, so I end up giving it another shot whether I want to or not every few months. Both my MBP and iMac had it turned on after the last Apple updates a few days ago, and I found out when I wasn't allowed to run something. If it were just unsigned apps I wouldn't mind so much, but it's the stupid, "This application came from the internet..." dialog box that drives me nuts most of the time.