Valve, being the ever-amusing and skilled developer of such games as Half life 2, Left 4 dead and Portal, have kept their online gaming service Steam PC-only since its introduction in 2004 - but is that now changing?
We certainly think so; they've released six images to six different websites across the interweb, each hinting at Apple's Mac platform getting their own version of Steam (and possibly even Mac compatible Source games!).
Each picture is styled in the Mac style, and each is an amusing play on Apple's ads over the years - so jump into our convenient gallery of pics to see them in all their awesomeneity.
Not content with teasing Mac users, Valve have also released a patch for the original Portal game that adds in a total of 26 radios throughout the game - each that play a series of Morse code beeps when carried to specific areas.
Arstechnica describe them in more detail, and the Steam forums have collected the hints into a gigantic list, but perhaps most disturbing of all is the sound that the radios make when thrown into a force field (make sure you don't have your audio blaring).
Whether or not this is an actual confirmation for either Steam on Mac or Portal 2 is of course unconfirmed; but Valve wouldn't go to this amount of trouble for no reason.