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Can I use a 2013 IMAC (Catalina) as a second monitor for a M1 IMAC?
iMac, OS X 10.11
See why it won't work here: Use your iMac as a display with target display mode - Apple Support
See why it won't work here: Use your iMac as a display with target display mode - Apple Support
Sorry, no. That is not possible.
Jack
+1 no it will not work. If your new M1 iMac needs an external display, please buy one. You can find them beginning at about $100, they are very simple to connect and are very reliable.
can I connect a 2013 Imac (Catalina) to an M1 imac as an external display
