Disable App Nap in MacOS 10.9 (Mavericks) application

by

the activity need to be stored in a property. So I added this in the header-file:

@property (strong) id activity;

and then used this implementation.

if ([[NSProcessInfo processInfo] respondsToSelector:@selector(beginActivityWithOptions:reason:)]) {
    self.activity = [[NSProcessInfo processInfo] beginActivityWithOptions:0x00FFFFFF reason:@"receiving OSC messages"];
}

Thanks to all contributors!

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