The Left 4 Dead Blog has word plans for the Valve developers to play online with folks upon tomorrow's release of The Sacrifice DLC for Left 4 Dead and Left 4 Dead 2. They also show the way to this update with a confirmation that the Mac edition of Left 4 Dead 2 will be released tomorrow, and will be followed by the release of Left 4 Dead at a later date, which they "hope" will be before the end of this month. Here's word:

Left 4 Dead 2 will be released on the Mac Tuesday October 5th. If you already own it on the PC, then you own it on the Mac. All you need to do is install it on your Mac and start playing.

If you don’t already own it, now is a great time to pick it up. Not only do you get Left 4 Dead 2 but steam owners get all the previously released DLC for free! So you get the original 5 Campaigns and “The Passing”, “The Sacrifice” and “No Mercy.” Best of all, there is already a thriving community and excellent community created campaigns waiting for you.

Sorry Left 4 Dead owners, the Mac version is coming but we are running a little late. We hope to have it out in time to celebrate Halloween on the Mac. When released, L4D1 Mac players will receive the same great treatment. All the previous released updates and DLC for free and the ability to play an extensive library of community content. More information on the release date as it nears.