How can I update the OS for my iMac 27 inch (late 2013) from High Sierra (10.13.6) to Catalina (10.15)?
How can I update the OS for my iMac 27 inch (late 2013) from High Sierra (10.13.6) to Catalina (10.15)?
I have looked in the APP store and system preferences for an update and cannot find anything to help me switch to Catalina.
iMac 27″, macOS 10.13
