iMac as a second screen
I want to use my iMac as a second screen with my MacBook Pro.
iMac is running High Sierra, MacBook Pro Monterey
hHave connected the 2 using Thunderbolt/HMDI to an HDMI/USBC.
iMac does not see MacBook.
Help?
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Both your iMac and your MacBook must be old enough for this to work.
Here is how, and how old each must be:
… Use your iMac as a display with target display mode - Apple Support
