Related Article: If your external display is dark or low resolution

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Updated iMac to Big Sur and now cannot connect it as external monitor to MBP

I updated my 2014 iMac 27" to Big Sur, and now I cannot connect it to my 2016 MBP(running Catalina) as an external monitor. I tried command+F2 and nothing happens. There is no option for external display options on my MBP either. I have connected the iMac as an external before using different OS on each computer. Is anyone else having this problem, and is there a fix for this?

iMac 27″, macOS 11.0

Posted on Dec 13, 2020 10:46 AM

Reply
Question marked as Apple recommended

Use your iMac as a display with target display mode - Apple Support

"Target display mode requires macOS High Sierra or earlier on the iMac used as the external display. It does not work with macOS Mojave or later."

Posted on Dec 13, 2020 8:45 PM

1 reply

Updated iMac to Big Sur and now cannot connect it as external monitor to MBP

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.