10.9: Disable App Nap System Wide

The Finder/Get Info checkmark for preventing App Nap sometimes disappears, seemingly at random. Maybe the app updates itself, or just writes something to the application directory and the checkmark is gone. The next day your overnight render is at 10%. So in Terminal, type:

defaults write NSGlobalDomain NSAppSleepDisabled -bool YES

This seems to prevent App Nap completely, looking at the Activity Monitor » Energy » App Nap column. Running programs need to be restarted for the change to take effect.

[crarko adds: I tried the command; not sure if it’s really made a difference. I don’t do overnight renders, but if people who do leave lengthy processes going care to comment, we care to listen. I’m really curious about the check box resetting itself.]