I connected the Thunderbolt cable and pressed command 2 but will not flip my Macbook screen to the iMac. I've read the my Macbook needs to be running an earlier version than Big Sur. Has anyone found a way to do this running Big Sur?
You haven't told us which iMac and which MacBook Air you are using.
Even if the iMac is one that supports Thunderbolt Target Display Mode, you're out of luck. Apple restricted Target Display Mode after the fact. Your iMac is running an OS later than High Sierra, your MacBook Air is running an OS later than Catalina, and you might be using a MacBook Air introduced in 2020 or later.
There might be other possibilities such as AirPlay or third-party "workaround" products, but as far as a hardware monitor goes, if you want one of those, you'll have to get a standalone hardware monitor.
You haven't told us which iMac and which MacBook Air you are using.
Even if the iMac is one that supports Thunderbolt Target Display Mode, you're out of luck. Apple restricted Target Display Mode after the fact. Your iMac is running an OS later than High Sierra, your MacBook Air is running an OS later than Catalina, and you might be using a MacBook Air introduced in 2020 or later.
There might be other possibilities such as AirPlay or third-party "workaround" products, but as far as a hardware monitor goes, if you want one of those, you'll have to get a standalone hardware monitor.
In your case, the issue is the versions of the OS - on both computers.
Mojave is too new to support TDM on the iMac, and Big Sur (on the 2019 MacBook Air) is too new to take advantage of a TDM-capable iMac.
Sorry I thought the issue was the OS. It is a 2019 MacBook Air and an iMac late 2012
I want to use the old iMac as a monitor for the MacBook Air
My MacBook Air OS is Big Sur, my old iMac OS is Mojave. Has anyone been able to find a way to connect an iMac running Mojave as a monitor for a MacBook running Big Sur?
