I run Little Snitch to monitor my network traffic. However, on Mountain Lion, power nap runs while my computer is sleeping so I can't approve new rules for Little Snitch to allow power nap to connect to Apple and the App Store. What rules should I add to Little Snitch to allow power nap to operate properly?
MacOS – Little Snitch rules for power nap
macosNetworkpower-nap
Related Solutions
PRAM Reset
On boot, hold ⌘ cmd + ⌥ alt + P + R until the second boot chime. This can fix a variety of things including problems due to recent kernel panics.
Recovery HD
On boot, hold ⌘ cmd + R to boot into the Recovery HD. If this fails, hold ⌥ alt on boot, and select Recovery from the options available.
From here, you can open Disk Utility and select Repair Disk.
Target Disk Mode
If you wish to get information from the computer, and you have another computer and some way of connecting the two, you can boot into Target Disk Mode by holding T on boot. Files can then be taken off the drive by the other computer as if it was a normal external drive.
Internet Recovery
If you have a recent backup or Target Disk Mode worked (and your Mac is post-July 2011) you can start fresh by using Internet Recovery.
Hold ⌘ cmd + ⌥ alt + R on boot to begin. A new copy of OS X will be downloaded from the internet and installed, erasing your internal drive.
Just post my settings in case anyone need it.
System Preferences -> Network -> Advance
TCP/IP: set "Configure IPv4" off.
DNS: add 2001:778::37, and drag it to the top
Now you should be able to see contents in Mac app store. And it might take quite a while to establish connections for downloading. Just be patient.
I also found a line in my
/etc/hosts(copied from this IPv6 hosts project, which was up-to-date and very useful for IPv6 users in mainland China):2600:140b:4:18c::c77 www.apple.com #e3191.dscc.akamaiedge.net
I'm not sure if it affects the result. If Step 1 doesn't work, you can consider to add it into your
/etc/hostsfile. Just remember to make a backup first.
Best Answer
Power Nap is not an application, it is a set of hardware-level functionality that causes the Mac to wake from sleep, but only with disk, CPU, and networking hardware active - no video or audio. However, third-party applications run as normal during this "DarkWake" period (Apple's term). Therefore, Little Snitch should use whatever rules you have in place while the computer is fully awake.
This appears to be confirmed by the mention of Power Nap on Little Snitch developer objective development's blog, in an article about Automatic Profile Switching. That functionality found in Little Snitch allows the system to automatically switch rules based on what network your Mac finds itself on. As long as you're on a network that you've previously used, and have rules set up for, Little Snitch should use those same rules during DarkWake. Presumably you allow all of the things that Apple would do during DarkWake when you're actively using your computer (checking email, App Store updates, Photo Stream updates, iCloud document sync, etc.) so the rules already in place should suffice for use during DarkWake.