MacPro sleep issue
If you bring up a terminal and type
more /var/log/system.log you should see what device is waking up your box. Mine has been annoying me by waking up by itself and never going to sleep and I finally started poking around. My log shows this:
May 30 23:22:00 MacPro kernel[0]: AirPort: Link Down on en2
May 30 23:22:01 MacPro kernel[0]: System Sleep
May 31 09:23:00 MacPro kernel[0]: Wake reason = UHC4
May 31 09:23:00 MacPro kernel[0]: System Wake
May 31 09:23:00 MacPro kernel[0]: Previous Sleep Cause: 5
May 31 09:23:00 MacPro kernel[0]: USB (UHCI)
ort 2 on bus 0x1a has remote wakeup from some device
Now i need to track down what device the above is. I haven't gotten around to that yet. It's either my ups, keyboard or mouse or a PS3 eye.
If you want to watch IO (or any number of other things), you can do it with dtrace which is built-in. I was watching IO on my 09 MacPro to try to see what was going on and it showed this:
Sat May 30 23:22:00 2009 ?? ??/libexec/airportd
R
Sun May 31 09:23:00 2009 ?? ??/sbin/periodic
R
Sun May 31 09:23:00 2009 ?? ??/libexec/dirhelper
R
Periodic was the first thing run when the box woke up but it doesn't seem likely that it's my problem.
Hope it help.