Sony A7SIII 422 4K 120FPS Footage not playing back or editing well.
New to all of this and looking for some solutions. Not the most knowledgable so be kind. I am typically a sony a7iii shooter. I was working on something a little bit more important and rented an a7siii. I shot all day in 422 4K 120fps and my computer refuses to edit well with it. I am running a 2020 iMac with the 5700XT with 16gb of VRAM and have made proxies of the footage for editing with no luck. I occassionally get playback if I render the timeline but even that is hit or miss. Thanks in advance.