I just fired up Steam and now I'm downloading HL for Mac.

Thanks for confirming! I'm doing the same.

Not in Australia yet, sadly :(

edit: I spoke too soon. You just have to own the Windows version, and the mac version will appear. Downloading!

Ack! Not available for me yet. Is it all the goldsrc games, or just HL? Ok, really all I want to know: CS 1.6 available?

Finally!! Us Mac users are used to waiting a little longer than PC users to get a compatible version of the game, but 15 years must be some kind of record.

Well, this is Valve Time (c) we are dealing with here :)

https://developer.valvesoftware.com/wiki/Valve_Time

It almost made it out way back when, but was cancelled at the last minute. There’s an interview with one of the developers about it on Youtube: http://www.youtube.com/watch?v=JBg6L4H7WdE

Looking at the steam registry link[1] posted by Breakthrough, it looks like there is a mention of osx in the app.

[1] http://cdr.xpaw.ru/app/70/

Edit: I opened Steam on my mac, Half-Life is showing up under "Mac games," I'm downloading it now. Great.