Upgrade from iMac (27-inch, Late 2012) 24-inch Blue iMac
How do I move my software from the old iMac to the new 24-inch iMac?
iMac 27″, macOS 10.15
Question marked as
Best reply
Using your Time Machine backup, is the fastest and easiest way to move from the 27" to the 24" iMac.
see > Move content to a new Mac - Apple Support
Migration moves your user setting and data into the new macOS and App's. There is a chance, that you may need to update, reinstall or even replace some older third party App's.