iMac 2020, 27” crashes with 2nd monitor

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iMac 2020, 27” crashes with 2nd monitor

iMac 2020, 27”, 3.6 GHz 10-Core Intel Core i9, AMD Radeon Pro 5500 XT 8 GB, 96 GB 2667 MHz DDR4, Sonoma 14.6.1. Using NXT Technologies NX29742 0.5' Mini DisplayPort/HDMI Audio/Video Adapter

to interface with OWCTB3DK 14PSG THUNDERBOLT 3 DOCK, connecting 2nd monitor, (ACER KB 272 , 2024).

All externals connected to T3 dock work fine, no problem with iMac. iMac crashes every time I connect the 2nd monitor. Please advise.

Thank you,

Nairb

iMac 27″, macOS 14.6

Posted on Oct 7, 2024 2:49 PM

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Answer 1

BDAqua

Level 10

244,961 points

Oct 8, 2024 1:38 AM in response to Nairb87

In Disk Utility>View, select Show all Devices, highlight the top left entry.

Run Disk First Aid on all items in the left panel, from top down.

Are you running any VPN, Anti-Virus, or Cleaning apps?

We need to see what all is running, a report from this will not display any personal info...

Using EtreCheck - Apple Community

EtreCheck is a FREE simple little diagnostic tool 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. It will not display any personal info. Give it Full Disk Access.

https://www.etrecheck.com/

Give etrecheck Full Disk Access before running.

Thanks for Old Toad’s etrecheck instructions…

Slow iMac 2017 - Apple Community

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