I'm not sure if this has been discussed before, but a quick search didn't show up anything. I made a little discovery that I wanted to share in case it helps anyone.
I purchased a D500 10 days ago (New Aquatica Housing this week!) only to discover that I couldn't open Nikon's new (to me) RAW format. After a few minutes of Googling, I got a knot in my stomach. I am using a 4 year old MacBook Pro, and I own Adobe Creative Suite 5.5. In a nutshell, "everybody" said I had to get the free DNG converter from Adobe. Problem was, to get the most current DNG wizard, I'd need to update my Mac OS to (cringe) Catalina, which is getting lukewarm reviews. More importantly, if I updated the OS, none of my CS 5.5 software would work (nor my MS Office, but who cares.)
So that meant "renting forever" LR and PS... not a huge expense, but the kicker was, I use InDesign for publication stuff, so suddenly I'm looking at about $75 CDN a month,... forever. Not cool.
Anyway, after searching for some workaround, I was convinced I was screwed. But it seems a modified solution was right in front of me, and it was dirt simple. And free!
It seems that the Mac "Preview" application will open the NEF files. From there, it's a simple step to export as a TIFF, which if uncompressed is about 150 MB file. That opens beautifully in LR and PS and while it may not be the true RAW, it's a glorious hi res file.
So there you go.. saved me a fortune.
Happy shooting.
(PS I'll be listing my D7000 housing and camera shortly. It' being overhauled this week at Aquatica!)