Update: The closed beta is finally over and the official public Steam for Mac is now available for everyone. Portal is available for completely free and there is a considerable list of around 60 titles alreayd available for the Mac! List below:

TriJinx: A Kristine Kross Mystery
World of Goo
Zuma Deluxe
Sid Meier’s Civilization IV
And Yet It Moves
Braid
Escape Rosecliff Island
Civilization IV: Warlords
Civilization IV: Beyond the Sword
Sid Meier’s Civilization: Colonization
Sid Meier’s Civilization: The Complete Edition
BRAINPIPE: A Plunge to Unhumanity
Diaper Dash®
Machinarium
Football Manager 2010
Bob Came in Pieces
KrissX
Sam & Max: The Devil’s Playhouse
Galcon Fusion
Quantz
Torchlight
Toki Tori
Valerie Porter and the Scarlet Scandal
Parking Dash
The Nightshift Code
Nightshift Legacy: The Jaguar’s Eye
Mahjong Roadshow
Hotel Dash Suite Success
DinerTown Detective Agency
Fitness Dash
Gemini Lost
Atlantis Sky Patrol
Fairway Solitaire
Professor Fizzwizzle and the Molten Mystery
Unwell Mel
My Tribe
Tales of Monkey Island Complete Pack
Osmos
Wandering Willows
Wedding Dash 2: Rings Around the World
Zenerchi
Dream Chronicles: The Chosen Child
Diner Dash: Hometown Hero
Cooking Dash
Chocolatier: Decadence by Design
LUXOR: Mah Jong
The Dig
LOOM
Indiana Jones and the Last Crusade
Indiana Jones and the Fate of Atlantis
City of Heroes: Architect Edition
Peggle Nights
Luxor
Luxor 3
Portal
Peggle Deluxe
Bejeweled 2 Deluxe
Bookworm Deluxe
Chuzzle Deluxe

Valve announced yesterday that the Steam for Mac client would be released today. While there is no official word on the Valve website or an official download link posted, we have discovered that there is a direct download link available that will let you grab the public Steam.dmg client right now!!  Thanks to @SwaroopH for the tip.

However, while you can get your hands on the client, it is still officially in closed beta until later today when Valve makes the official launch. This means you will have to sign in with a closed beta ID until then.

Update: Our friends at Gizmodo have figured out a trick to start playing right away even if you do not have access to the closed beta.

Once you have installed the Steam for Mac client you can head over to the Mac Beta page.

Click the “Play Portal now for free” link in the add shown below. Tell it to open the link using the Steam client you have just installed and the download will begin.

You can also browse other games by simply clicking the Update News button in the “Updating Portal” dialogue box.

[via Gizmodo]