I have a Mac Pro that has always faithfully turned off the displays after 15 minutes, and required password to unlock the screens. The computer never actually slept, it just turned off the displays and then required the password on moving the mouse or whatever. That has stopped happening and I don't know why. One of the ways I am noticing this is doing screen sharing from work. I connect to my Mac Pro, and for years, it has always given me the black screen with the "username and password" locked dialog. But since the last week or so, when I connect to the VNC, the desktop just appears - the Mac Pro wasn't in a locked mode, despite being untouched an at home for hours. Also, the displays won't turn off no matter how long I leave it. I couldn't sleep so I went into the computer room for a while at 1am - the monitors were on and the desktop was showing. WTF? There are no new programs or processes running other than "iStat Menus." Everything else is the same. Now - funny enough, I had my new Macbook Air here at work, and it was open and running on battery at a full charge. I wanted to leave it open so it would drain a little battery and then sleep itself. I come back from 2 hours of meetings - it was at 6%, almost dead. It never went to sleep despite being set to sleep at 5 minutes. WTF? This computer also has iStat Menus newly installed. Other than disabling iStat and setting the sleep timers to one minute, how can I test this to see what could be running to: - keep the displays on - keep the screens from locking - keep the computer on There is nothing that I know of that would be a keepalive process, there are no programs running that could be the cuplrit, there are just the background menubar items like evernote, dropbox,and the istat menus, none of which should effect sleep/lock. Thoughts?