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Question: iMac constantly rebooting

When I power up my iMac it goes through the usual steps leading up to the login screen. Then it goes to a plain black screen, then a grey one with a message that it has restarted due to an error. It shuts down and immediately starts up and does the same thing.


Because I can't get into it, I can't say which OS it's trying to run. But it started after an update.


How can I break the cycle?

G5, Mac OS X (10.3.9)

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Mar 10, 2018 6:46 AM in response to dialabrain In response to dialabrain

Sorry, I think the details were picked up automatically off this iMac that I'm using now.


It's my old iMac that I bought in 2012 that has the problem. I can't tell you which version of the OS but I have kept updating it so while it may not be the latest, it's not that old.

Mar 10, 2018 6:46 AM

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Question: iMac constantly rebooting