Welcome to the forum! Hope you enjoy flying your new
Mavic 2 Pro. As for editing the video it shoots, the
Mavic 2 Pro records h.264 and h.265 video depending on your settings. Your 11 year old Mac may be able to handle some minimal h.264 work but it will definitely struggle and h.265s are probably a no go.
Sounds like you’re interested in a newer iMac or MacBook. I personally edit on a 2019 iMac with an 8th gen Core i5, 32 gigs of RAM and a discrete graphics card. I forget the exact graphics specs but it’s handled everything my
Mavic 2 Pro has thrown at it with no problem. If you’re looking to future proof it a bit more, grab a higher end processor, graphics and storage. The 27” iMacs still allow you to add more ram after purchase. So you could always do that later. But watch out, the RAM in the 21” is soldered on, so you’d need to get more when you order it. If you go MacBook, anything that’s a 15” or 16” Pro will have discreet graphics and a good current processor. Hope that helps a bit. Happy flying!