Intel iMac won't shut dowm

Joined
Aug 31, 2008
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About every other day, when I shut down from the menu, I get an error saying an application failed to shut down and shutdown fails. The application is purely random. I have to then do a hard shutdown. If I run maintenance (Onyx), the problem disappears momentarily but returns within a day or two. Very frustrating. Anybody have any ideas?
 
Joined
Jun 12, 2007
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Location
Brooklyn NY
Your Mac's Specs
15" MacBook Pro
Something like that recently happened to me. Safari would randomly quit, occasionally had no finder windows, and i couldnt shut down, sleep or restart. The Mac Genius told me to reinstall Leopard. I did an erase and install and then used Time Machine to get all my data back and since then, i havent had a problem
 
Joined
Mar 15, 2006
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Your Mac's Specs
2015 Retina 4K iMac. Catalina. 8GB RAM. Crucial 500GB external SSD
try zapping the pram, see if that makes any difference. Hold down the

Command option P R keys during startup until you hear two chimes.
 

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