Pedantic correction: App Nap is the feature being discussed here to give less CPU time to apps which don't need it. Power Nap is the marketing name of the prev

Pedantic correction: App Nap is the feature being discussed here to give less CPU time to apps which don't need it. Power Nap is the marketing name of the previously-released (in 10.8) feature whereby a Mac in sleep mode still does things like check email, update calendars, perform automatic photo downloads, etc.