No power nap on MacBook Pro Retina

This feature not available now on rMBP. I believe it will require a firmware update.

Wait for Apple to release the firmware update.

coming soon

http://support.apple.com/kb/HT5394?viewlocale=en_US&locale=en_US

The firmware update por Retina MBP is available. See:

http://support.apple.com/kb/HT5394

Not yet.

@Nightshade_one - When the firmaware update is available it will show up for you under the Updates tab at the Mac App Store. Install the update, and go to Sys Prefs > Energy Saver to enable Power Nap.

Check again. CMD-R it.

I've just downloaded and installed from that page and it's working!

Things do change quickly! 😁

Indeed!