Thanks for the Software Tipp. I Know this Tool, but it is Not useable for me. Iam also using my Mac mini for tv Recording with elgato Eyetv. Normally my Mac Wake up automactically, Record the tv Show, then automacically go to Sleep.
With your Tool, you only can say, Mac, go to Sleep After xx minutes. Wehn is say, go to Sleep After 30 minutes, and the tv Show Görs 60 minutes, the Mac Görs Sperling dring Recording. Bad idea.
I Need a possiblity to say, if mac Idle is for 30 minutes then go to Sleep. The Tool have to check, if Idle is true.
that was it!! for me it had to do with "Printer Sharing"
I used the "pmset -g assertions" and noticed there was 2 processes, one of them was cups (related to printing)
I toggled "Printer Sharing" off and our iMac is able to go to sleep - hallelujah! this issue was driving me nuts as rebooting the machine didn't make a difference - so it has something to do with the way the printer sharing settings carried over from 10.6.x
I've toggled Printer Sharing back on and another "pmset -g assertions" doesn't show any processes and sure enough it's able to go to sleep.
I'll see how long this lasts and at least know if it does happen again, that this is likely to be the culrpit.
Friends - I made a seperate post about this issue and then found this forum
I have a MBP (SSD) that wouldn't wake up after sleeping if MagSafe was plugged in
This solution worked for me -
I went into SYSTEM PREFS and noticed that I had PRINTER SHARING active on an HP printer that I never use - in addition, I had 3 HP printers installed, but I never use any of them
I deleted the three HP Printers, turned PRINTER SHARING off on all printers and also went into SECURITY SETTINGS and DISABLED INFRARED REMOTE
Lastly, I also made sure that FILE SHARING and all other types of NETWORK SHARING were off, which they were
Fingers crossed, I hope it stays this way!
My problem was my iMac not wanting to sleep. I had just loaded Lion and also the October Apple update of all printer drivers. When Sleep was clicked the machine shut down for about 10 seconds , then restarted. If I just left the machine ON, it would sleep per the settings under Preferences-Energy Saving, but then awake again after about 15 minutes. Finally I shut down the iMac, the printer and the scanner. Disconnected the usb cables. Restarted the iMac. Plugged in the usb cables. Turned the printer and scanner ON. Made sure there was not a que of items to be printed. After this, the iMac went to sleep properly.
No need to touch your library folder
Open SYSTEM PREFERENCES and click on PRINT & SCAN - your printers will be on the left-hand side - just delete whatever printers you're not using - also, click on SHARING PREFERENCES as that will be on the right-hand side, and I would recommend turning off any sharing that you're not using
BTW - disabling the remote (the other thing I did) could also solve the problem outright - I just deleted my HP printers because I don't use them anymore
Anyways - hope that answers your question
Unfortunately, my MBP is still not falling asleep. Forcing it by shutting the lid or through the Apple menu works, but my Energy Saver prefs are not acknowledged, either plugged in or on battery.
pmset -g assertions shows this:
And I have nothing in my printer queues. I have no File Sharing or any other preferences turned on that have been mentioned here. This has been an issue since I clean installed Lion a few months ago.