I was given access a couple of weeks ago and replied in your other thread.
https://forums.alliedmods.net/showthread.php?t=284240
It's mostly working as-is, just detecting the game as Insurgency. Gamedata for features that require it will come when it's a bit more convenient to do so.
I believe that one of the other SM devs,
KyleS, was also looking to get a key if possible though.
Edit: looks like there are Mac bins now, so gamedata will be relatively easy to generate. I'll look into that later today. We also may later spin off a new SDK from the Insurgency one, for if/when the game's engines get out of sync, but it won't effect normal SM operation when we make that transition.