iMac is intermittently holding and restarting

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iMac is intermittently holding and restarting

I am running latest 10.14.4 os on my iMac - 2014 5k quad core - 32gb ram.

It has started to freeze, hold and crash in LR and FXCP and Zoom. Generally any programmes really. I've re formatted my fusion drive reinstalled Catalina. I am now getting error messages as attached and its still restarting on its on - I've turned screen saving mode off in case it was that. The scan of my drive on saying that MT Mapping isn't referenced - something isn't right. Either a faulty fusion drive or a software issue. Any ideas would be really helpful.

iMac with Retina 5K display, macOS 10.15

Posted on May 23, 2020 8:48 AM

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Answer 1

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BDAqua

Level 10

245,579 points

May 23, 2020 10:36 AM in response to jonny190

Looks like an unrecoverable APFS error...

https://discussions.apple.com/thread/250784142?answerId=251700143022#251700143022

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Answer 2

BDAqua

Level 10

245,579 points

May 25, 2020 10:05 AM in response to jonny190

Safe Boot from the HD, (holding Shift key down at startup), does the problem occur in Safe Mode?

Safe mode attempts to repair Disks & clears lots of caches, so if Safe Mode works try again in regular boot.

You can save us asking dozens of questions by submitting a report...

EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac.

http://www.etresoft.com/etrecheck

Pastebin is a good place to paste the whole report if you capture the URL while there…

https://pastebin.com/

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...

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