Why does my iMac wake from sleep

Logs are hard to decipher for most of us here. Maybe something in the following will help.

This is for a Mac that won't sleep.
Here is Apple doc.#303698 with their tips.
Mine follow;
USB devices and hubs often cause Macs to not sleep or wake quickly from sleep (notably HP printers and scanners, HP all in ones, and Cannon scanners). Disconnect all USB except for keyboard and mouse and try. If it sleeps, add one back at a time testing after each one to find the culprit.
If you've set your Mac to receive faxes, it may not be able to sleep. It might also have a damaged preferences file.
If you use your Mac for faxing, open System Preferences. click Print & Fax, click the Faxing tab, and uncheck the Receive Faxes On This Computer box.
If that doesn't work or you've never faxed on your Mac, go to Finder/Hard Drive /Library/Preferences/SystemConfiguration and delete the com.apple.PowerManagement.plist and com..apple.AutoWake.plist files (if your Mac asks, type your admin. password).
If the latter file isn't present in the folder, go to user name(probably your name)/Library/Preferences, delete the com.apple.systemuiserver.plist file, and reboot your Mac.

Also, if you have an External Western Digital (WD) hard drive and have installed
WDDMService and WDSmartWareD on your Mac, it may not sleep. Fix is to un-install those....you don't need them to use the drive.

Hope this helps!

P.S. One member here reported this ( Michael Gleason);
"I have had this problem with my IMac G5. It is surprisingly irritating. LaCie's Silverkeeper backup software was the cause. By default it gave itself permission to wake up the computer to check if a backup was needed. Do you have this or a similar program installed which has scheduled activities including wake-up permissions as an option?"
Dave Hamilton provided this link, xlr8yourmac.com, to a member, which addresses failure of deep sleep with some users that updated and added new FireWire and USB cards. Also, here is Apple doc.#305262 about PCI cards and sleep.
tomhorvat adds this; After few days of messing around I found out that I had desktop background (wallpaper) set to change every 1 minute.
After unchecking "Change picture..." in system preferences (under Desktop/Screen saver), my powerbook went to sleep all by itself.
Tristan Currier noticed this; "I have a Canon printer(shared) and my imac would not sleep. I opened up printer/fax in system prefs and noticed it said the printer was in use when it was off. Opened up the printer queue and noticed about 7 pending documents. Deleted them all and now it sleeps.
Check the printer queue!"



Good Luck!  DALE

Wish you luck!

Dale

You are welcome!

Thanks for the feedback.

Dale

I had the same problem (my macbook would not stay asleep and actually turn itself on from switched off too!), and I located the problem in another 3rd party s/w: Alarm Clock (Ver. 2.4.5, written by Robbie Hanson). When I installed it, it also installed deamon in order to be able to wake up/turn on the computer when an alarm was planned to go off (this deamon is actually quite handy because now I do not get a 'safely disconnect' error message for external devices when I close the lid).

In "Preferences->Advanced" of the Alarm Clock, there is an option for "Wake computer from sleep" (requires one-time authentication). As soon as I unchecked this option, my sleeping problems disappeared! This will probably mean I cannot have an alarm going off when the computer is asleep, but this is a negligible price to pay!

Hope this helps others with the same/similar programs that utilise deamon.