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On the iMac 27 2020, do the external monitors have to be at least 4K to be recognized? I tried an older HD monitor and could not even get an "arrangement" tab. It would not detect the other display when I clicked on detect display. I am curious as to whether the issue is the HD monitor or the iMac or the cable I used, but obviously don't want to go buy a 4K monitor for troubleshooting purposes.
iMac Line (2012 and Later)
The Technical Specifications of the 2020 27" iMacs external display state:
I believe these are maximum resolutions. Please verify you are using high quality cables and adapters, they do make a difference.
The Technical Specifications of the 2020 27" iMacs external display state:
I believe these are maximum resolutions. Please verify you are using high quality cables and adapters, they do make a difference.
External monitor added to iMac 27 2020
