@Ford. Rebooting a computer just to download a file is probably too much effort for me.
Yeah, if I have to reboot to Windows, launch Steam, and then go to workshop and get the mod, I might as well just play the game there. I love my Mac, but, if I'm already in Windows to get the mod, I might as well play it under Windows anyway, and not go to the trouble of procuring/unpacking/moving the mod to the right place Mac-side. It's not that any of those things are difficult; just annoying to have to bother with.
As I've pointed out before, once DLL support comes, and all the good mods use it, Mac users are screwed again, unless something changes.