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Why I can use target display mode? I have an iMac 27inch, late 2012 running Catalina 10.15.7. My MacBook Pro (13 inch, 2018) runs Big Sur 11.6. O have apple original cables, the keyboard on the iMac is original as well so not sure why I can’t make it work.
iMac 27″, macOS 10.15
Hi,
You must install High Sierra or earlier version of MacOS on your iMac for Target Display Mode.
Use your iMac as a display with target display mode - Apple Support
Hi,
You must install High Sierra or earlier version of MacOS on your iMac for Target Display Mode.
Use your iMac as a display with target display mode - Apple Support
Target Display
