Mine is a 13".
You could try resetting the SMC (I did this on a whim yesterday):
http://support.apple.com/kb/HT3964?viewlocale=en_US&locale=en_US
I also clicked "Restore Defaults" in Energy Saver, and have Power Nap enabled in both Battery and Power Adapter (I tested with the Power Adapter connected).
Still works 100% on my MBA 11", no side effects, no more fans than usual, no weird behavior whatsoever.
the 2010 MBA is still connected to the network when asleep. I can confirm that.
If Apple doesn't release a firmware update for the other computers then it's absolutely outrageous. Especially considering they promised paying customers to be supported.
Thanks for posting these 2010 MacBook Air SMC updates!
Power Nap in OS X Mountain Lion works just fine now on my MacBook Air (13-inch, Late 2010), both on battery or on AC. E-mails are received and Time Machine continues per the way the feature is advertised. No fan activity at all while "Power Napping", Apple logo on cover is dark, from appearances no different from previous sleep mode.
Side effect is that opening the lid to wake from sleep is truly instant as well. It only used to take around a second for the computer to be responsive previously, so it's not like it was a problem, but now that second is gone.
I don't know why it doesn't work for some folks, but it clearly works for me. My MBA:
Model Identifier: MacBookAir3,2
Processor Name: Intel Core 2 Duo
Memory: 4 GB
Boot ROM Version: MBA31.0061.B07
SMC Version (system): 1.66f57
APPLE SSD TS256C:
Capacity: 251 GB (251,000,193,024 bytes)
Model: APPLE SSD TS256C
Revision: CJAA0201
Thats sad... I have the same tec specs, except Kapazität:121,33 GB Modell: APPLE SSD TS128C. But PowerNap will not work.
But when mail is open, MBA in sleep, no mails are there when I open it.
Just a few seconds later after mail is receiving.
How often does Power Nap check for updates or back up?
- Mail, Contacts, Calendar, Reminders, Notes, Photo Stream, Find My Mac, and iCloud Documents are checked every hour.
- Time Machine backups are attempted hourly until a successful backup has been completed.
- Software Updates are checked daily.
- Mac App Store downloads are checked once a week.
I can't install the SMC Firmware. The version for the mid 2011 Air downloads, but then tells me my system doesn't support it when I try to install it. Anyone else came across this? The settings in Energy Saver Preferences look right, though.
Did you download the pkg's in Post #1 of this thread? They are for Late 2010 MBAs (11" and 13"). They appeared to install fine for everyone that responded to this thread.