Thank you, yes it is the real Apple iMac, it will only update with Apple updates through Monterey. I thought the video card might be the limit. I will give it a shot. I appreciate the answer.If you mean a real Apple built 2015 iMac, yes it's possible using OCLP.
Should be very easy to accomplish with no more than the latest OCLP app and a few clicks. OCLP is all automated and takes a lot less effort than a hackintosh does.yes it is the real Apple iMac