How best to transfer data from a new iMac with Catalina to an older iMac with El Capitan
Hello
What will be the easiest way to move all of my collected data, files and photos from my 'new' iMac (Catalina) onto a 'clean' (empty) older iMac (El Capitan) which I have acquired? My intention will then be to wipe my new machine and start completely afresh without all of my clutter accumulated from 10+ years of 'playing' on the Internet!
The machines are side by side on my desk and are ready to spring into action!
Your advice will be much appreciated.
iMac 27" 5K, macOS 10.15