Interestingly, NVIDIA hasn't seen a lot of action on the Mac platform for quite a while. PC Perspective speculates there are two options here, either there's nothing to see here and NVIDIA is just updating support, or the company has received a new design win from Apple:
The other possibility is that NVIDIA might be expecting a design win with Apple. What? Who knows. It could be something as simple as Apple’s external GPU architecture allowing the user to select their own add-in board. Alternatively, Apple could have selected an NVIDIA GPU for one or more product lines, which they have not done since 2013 (as far as I can tell).If that's the case, we may know something by WWDC (early June) or around the back-to-school season in September.