Why would anyone tell the user that an app had quit, but actually leave it hanging around, near-useless, in memory?
Activity Monitor
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.
I went to close an enlarged view of a painting, and a Macintalk-like robot voice announced that my Mac was compromised.
ps and top are far superior tools for looking at processes than Activity Monitor.
When I play low-bandwidth radio on my iMac, it keeps interrupting, but that does not trouble my MacBook Pro. Why?
What has broken when Preview no longer opens PDF documents? The answer is more complex than it might appear.
Memory use is always in the ‘yellow’, and my Mac grinds to a halt. Why?
SystemUIServer sometimes runs my iMac out of memory. Why?
Although my Mac has 6 GB of memory, I have had to use the purge command with depressing frequency since OS X 10.6, before quitting anything, particularly Safari.
The Eclectic Light Company 