If you leave some apps without an open window, macOS appears to quit them, but instead puts them into App Nap, only to quit them when it wants to. They’re undead.
App Nap
When I’ve finished using an app, I usually quit it, only to open it again later. Can macOS manage apps any better than I can, or is it just becoming more like iOS?
Some apps nap, others enter the realm of the undead: they’ve gone, but are being kept in suspended animation. And Rosetta can keep them that way for a long time.
Four versions of the same app to demonstrate different app states in Sierra and High Sierra, and how your apps can join the undead.
This week, I have been attacked by zombies – half-dead apps which appear to have quit automatically, but […]
Why would anyone tell the user that an app had quit, but actually leave it hanging around, near-useless, in memory?
Put TextEdit or Preview into the background when they haven’t got an open window, and they quit automatically, don’t they? Actually they don’t, they just become zombies.
Despite its documentation vanishing, it’s clear that GCD does a lot more than provide an easy way to concurrency for app developers.