Posted July 01, 2023

I also think we can assume that neither GoG nor the publisher will ever comment on the situation. So basically, I would say that if you want the Mac version of NMS, you should probably go buy it on the Mac App Store. (I would recommend Steam except that I loathe Steam with every fiber of my being so.)
I already duckduckgo'ed for "transfer nms save from gog to steam" and it seems to work. Now there are some advantages and disadvantages each for GOG, Apple App Store and Steam, respectively.
I am seriously tempted to move my old 50h+save file to steam, as I plan to abandon Mac and PS5 for gaming in the next years (and build a PC gaming box). On the long term, that is a strong plus for GOG and Steam vs. Apple App store.