to use the imac as second monitor for my macbook, is that they have to run the same system ??
i got one of mine is running yosemite, another big sur os
how can the imac be used as a second monitor ya ? thanks.
iMac 27″, OS X 10.10
Not likely going to work, however please read Target Display Mode (TDM)
Not likely going to work, however please read Target Display Mode (TDM)
Welcome to the Apple Support Communities.
If any of the Macs are running macOS Big Sur, it is not compatible with Target Display Mode.
Jack
use imac as a second display
