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How do I get my late 2012 iMac to work as a second monitor, when it's running os 10.15.7 Catalina, and my 2019 macbook pro is running big sur? I've purchased both the Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter and the Thunderbolt Cable. I've restarted, tried detecting for other displays and nothing seems to work.
See this page: Use your iMac as a display with target display mode - Apple Support
The target Mac has to be running High Sierra or earlier.
See this page: Use your iMac as a display with target display mode - Apple Support
The target Mac has to be running High Sierra or earlier.
Sorry, but macOS Big Sur does not work with Target Display Mode. It won’t work.
Cheers,
Jack
iMac as a second display
