We will be offering the EFI V2 with support for Kepler in addition to DP 1.3 and 1.4 for Pascal and Maxwell. So 4K boot screens for a GT630/40 as well as GTX680 and GTX780.
I'dsay no more than 2 weeks. So if considering a 630/640 for Mojave, might be better to hold off. There will be a small price increase to cover R & D for new EFI. If you don't need 4K boot screens now or ever, buy the older version at regular price.
These new EFIs will be released in stages, starting with GTX1070Ti.
The Nvidia team was on it and cranked out a new 10.13.6 driver. Linked on our driver page, as well as 10.12.6 security update.
Good news, our EFI eGPU cards still work perfectly as tested on nMP 6,1.
Bad news, the multi Nvidia display screen output bug still in full effect on cMP. I guess we can't hope for a fix until 10.14 Mojave Drivers. Would still love a 10.13.6 fix but then I'm still waiting on a pony for my 7th birthday...