So apparently, if you've bought it through the Mac Store, then nothing else will work... I bought it through GOG but have been informed that this is basically useless. There's no time frame or estimate for when it's going to be coming. Don't see why it can't come in the form of a downloadable file to be installed on the user's end, I also have no interest in fiddling with Steam or GoG or these platforms.
Really not ideal in terms of getting info out there... if I knew that buying through the App store (the most obvious way to get something) was going to mean later updates and DLC, I wouldn't have done it. At this point it could be weeks or months until the patch is available.