As my 2015 gets slower and slower I am looking to get a new computer. My late 2015 is running Big Sur 11.7.4. I would like to buy a new mini if I am able connect the two so it can be the monitor.
Looking forward to hearing from you.
iMac 21.5″, macOS 11.7
Not a new Mini, no, and not with that iMac either..
Review the document: Use your iMac as a display with target display mode - Apple Support
Target display mode is a feature available with late 2009-Mid 2014 iMacs. The display Mac has to be running macOS High Sierra or older and the signal producing Mac has to be running macOS Catalina (ca. 2019) or earlier.
Nope' you need to use an external display with a new Mac mini.
Using iMac 2015 as a monitor for Mac Mini
