I use a 27" iMac with 32 gig RAM and a 4 Ghz , i7 quad core CPU...
Fast video editing of 4K is the norm for me.
BUT
I have recently started using a DJI X5R drone camera and CineLight, with some very odd results...?
Encoding Raw from the X5R to Prores 422HQ…..The CPU activity monitor shows...