Why is my iMac wakening up?

[Roxy Music]

Nov 13 07:13:42 MatsiMac loginwindow[40]: loginwindow SleepWakeCallback will power on, Currenttime:11/13/2011 7:13:42.014 AM - Waketime:11/13/2011 7:13:41.230 AM = Deltatime:0.784068942
Nov 13 07:13:42 MatsiMac loginwindow[40]: askForPasswordBuiltIn after makekey, Currenttime:11/13/2011 7:13:42.096 AM - Waketime:11/13/2011 7:13:41.230 AM = Deltatime:0.866395950
Nov 13 07:13:42 MatsiMac vmnet-bridge[102]: Dynamic store changed
Nov 13 07:13:42 MatsiMac vmnet-bridge[102]: Failed to read SCproperties for key: State:/Network/Global/IPv4
Nov 13 07:13:42 MatsiMac vmnet-bridge[102]: Stopping bridge for: en1
Nov 13 07:13:42 MatsiMac configd[14]: network configuration changed.
Nov 13 07:13:43 MatsiMac UserEventAgent[173]: **** ERROR: SCNetworkSignatureCopyActiveIdentifiers returned nil
Nov 13 07:13:45 MatsiMac airportd[77099]: failed to snag beacon
Nov 13 07:13:52 MatsiMac configd[14]: Sleep: Success - AC - Idle Sleep
Nov 13 07:13:52 MatsiMac configd[14]: Wake: Success - AC - EHC2
Nov 13 07:13:52 MatsiMac configd[14]: Hibernate Statistics
Nov 13 07:13:52 MatsiMac configd[14]: Kernel plugin-container com.apple.powermanagement.applicationresponse.timedout 30000 ms
Nov 13 07:13:52 MatsiMac kernel[0]: AFPSleepWakeHandler: waking up
Nov 13 07:13:52 MatsiMac configd[14]: network configuration changed.
Nov 13 07:13:52 MatsiMac vmnet-bridge[102]: Dynamic store changed
Nov 13 07:13:52 MatsiMac vmnet-bridge[102]: Started bridge for 0, en1
Nov 13 07:13:53 MatsiMac ntpd[29]: time reset +1.114266 s
Nov 13 07:13:53 MatsiMac vmnet-bridge[102]: Preferences changed called

 

[Detrius]

This portion of the log file does not say. Perhaps the machine is more specifically refusing to go to sleep because it's busy. Run "pmset -g assertions" to see if there's anything that's currently preventing sleep.