I've installed the additional patch for power nap, turned on the preference for both powered and battery option.
close my lid to let it sleep, hours later, the gmail is still hours old.
what's happening.
MacBook Air, OS X Mountain Lion
Posted on Jul 28, 2012 12:09 AM
Q: My Powernap is not working...
Mountain Lion: About Power Nap > http://support.apple.com/kb/HT5394