Practically any MIDI sequencing software that runs on the MAC platform can be used to control your DMX Operator. Brands like Logic and Mark of the Unicorn distribute powerful Mac-based software sequencers.
I'm much more familiar with the Windows platform than the Mac but in any event you will need a MIDI interface and a MIDI cable to connect your computer to the DMX Operator. I'm told that most Macs have a built-in MIDI interface. If not, you'll have to purchase one separately (like us PC owners).
Is your Elation software designed to run on Mac or Windows?