Benny,
**What's New in OS X: OS X Mavericks 10.9** says all that I know about
AppNap clearly and simply:
App Nap reduces power consumption by completely suspending your
app’s execution when it meets certain criteria. This ensures that
your app does not periodically wake up to do unnecessary work. An app
is considered to be a candidate for sleep if:
- It is not visible—if all of an app’s windows are either hidden
by other windows or minimized in a hidden dock, and the app is not in
the foreground
- It is not audible
- It has not explicitly disabled automatic termination
- It has not taken any power management assertions
When all of these conditions are met, OS X may put the app to sleep.
While asleep, the app is placed on a scheduling queue that rarely gets
actual time on the CPU.
The app wakes up automatically when the user brings the app to the
foreground or when the app receives a Mach message or Apple event.
Because I like to have MailMate open all the time, but don't like to
have windows open that I'm not actively using, I generally hide MailMate
after using it (expecting the menu bar counter to alert me of incoming
messages). That meant that all four of Apple's conditions were true, and
at some point OS X sent MailMate to sleep.
On 26 Feb 2014, at 3:58, Benny Kjær Nielsen wrote:
On 25 Feb 2014, at 23:47, John Cooper wrote:
I thought of AppNap, but I didn't know how to turn it off for
MailMate. (You have to open a Get Info window for the application
package and select the **Prevent AppNap** checkbox.) I've done that
now, and I'll bet it solves the problem.
Let me know when you have a conclusion on this. **Embarrassingly** I'm
still not on Mavericks on my development machine and I still have
little experience with AppNap.
--
Benny
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