How do i use my 'old' 2012 iMac as a secondary screen with my 2019 new iMac?
Can I use my existing late 2012 21" iMac (macOS Catalina installed) as a secondary screen for my brand-new 2019 iMac 21" with macOS Catalina?
Meaning iMac as extended screen for another iMac?
(I have seen no posts until now on this subject)
iMac Line (2012 and Later)