I am looking at buying a new ( or refurbished ) computer to do, among other things, video editing from my Mavic. I am a Mac guy so I was looking at some Refurbished iMacs for around $1200. Doe the iMac with a 4K screen have enough juice to run the video editing software? I am currently using a fairly new MacBook Air, but I don't think it has the power to make video editing anything other than tedious. I wondered how suitable the iMac is for 4K video editing ?