How to have two mac os systems on my imac
I bought a new imac with Mojave. I want to have the option to use El Capitan for some older apps.
Can I make a partition that is bootable in El Capitan? Mojave is saying I can't install El Capitan on a partition.
How would I have the option to boot up in El Capitan and still use Mojave when I want to?
iMac 27", macOS 10.14