Just a warning - approach the new updates with extreme caution (iPhoto, iMovie, Airport, Thunderbolt etc. etc) I tried to apply the new updates released by Apple last night on my 2011 iMac 27" and it has seriously screwed my OS (10.7). It initially fails to apply the updates after downloading and you are forced to re-boot - at which point the OS fails to boot up and reports a rather catastrophic kernel panic. There seems no way out of it as it seems some driver has been corrupted / is missing and I have been forced to restore a previous Time Machine backup to get my system running again. Apparently you can also just re-install the Lion OS using the recovery partition (via the internet) whilst maintaining your personal files. The issues is beginning to be discussed on two threads on Apple Support, but I suspect we'll see more problems being reported as people download the updates - the update under suspicion is the Thunderbolt update, but that's not confirmed: https://discussions.apple.com/message/18619661#18619661 https://discussions.apple.com/message/18619805#18619805#18619805 All rather annoying as I usually hold off applying updates for a few days to see if anyone has issues, not sure why I didn't this time but once bitten twice shy (also unusual for Apple updates to cause such a catastrophic kernel panic).