Hello. Im looking to use my mid 2010 21.5" iMac as a monitor for my M1 macbook pro.
I would greatly like to use the capability introduced in MacOS monterey which is "airplay receiver" in the sharing settings.
Im trying to upgrade my current OS to Monterey but it won't allow. I click EFI upon reboot then select to install the OS and it just goes to a black screen. after few minutes reboots. Doesn't matter what I select.
I've tried installing to a USB stick and installing OCL efi direct to hard drive and it doesn't work either way.
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