27" iMac won't stay asleep My 27" iMac wakes up from sleep randomly, even though I went through the "energy saver" preference pane, and bluetooth is only active for my mouse and keyboard.

What could be causing this?
In /Applications/Utilities/ run Terminal.app, then type this command:

syslog |grep -i "Wake reason"


What do you see?

The codes listed here might give you a clue as to what is going on: http://osxdaily.com/2010/07/17/why-mac-wakes-from-sleep/