I just installed the most recent update on my 2011 27" iMac and had something strange happen. When I rebooted it for only about 1-2 seconds a screen flashed up at the beginning of the boot process that was all red with christmas trees and stuff and said Merry Christmas (didn't get a good look at it) and I read the text "to boot to Macintosh SSD" right before it continued (I assume click X "to boot to Macintosh SSD" which is the name of my boot drive. What Happened??? Easter Egg much?? I'm freaking out right now, shut down and rebooted and did not see it again.