Catalina 10.15.7 freezes and restarts frequently.

My 2019 iMac 27" 5k retina display, Intel i9 processor, 2TB SSD drive with Radon image processor has started freezing and automatically restarting on a frequent basis. This makes is distressing to use. What can be done to stop this activity?


iMac 27″, macOS 10.15

Posted on Dec 1, 2020 8:02 PM

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Posted on Dec 1, 2020 10:06 PM

Try disconnecting all of your external peripherals that have any type of cable connection to the iMac. Then run the iMac without them and see if it stabilizes. If it does then you know it's one of the peripherals. At that point it is a matter of trial and error until you find the problem peripheral. How to do that is to add 1 peripheral and test extensively. Continue this process until you find the culprit. External peripherals can and do cause KPs.

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Dec 1, 2020 10:06 PM in response to Ronstable

Try disconnecting all of your external peripherals that have any type of cable connection to the iMac. Then run the iMac without them and see if it stabilizes. If it does then you know it's one of the peripherals. At that point it is a matter of trial and error until you find the problem peripheral. How to do that is to add 1 peripheral and test extensively. Continue this process until you find the culprit. External peripherals can and do cause KPs.

Dec 1, 2020 10:40 PM in response to rkaufmann87

I have disconnected a USB cable with several devices on it. May have helped a little. I note that it restarts automatically even when it's in sleep mode - black screen and no action. Seems to cause a different PANIC. I also note that I haven't added any peripherals since I originally set the computer up about 6 months ago, and they all ran fine on my old Mac. All this started about the same time Catalina updated to 10.15.7.


Obviously all the peripheral trials will take some time. But I'll give it a try tomorrow and perhaps over the next couple of days.


Thanks.

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Catalina 10.15.7 freezes and restarts frequently.

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