Each of the four games will sell individually at $4.99 and collectively in a $9.99 bundle, though LucasArts cautions that "the great price of $9.99" is a "limited time" thing.
There's no need to re-purchase if you already own the games via Steam PC, as LucasArts is among the companies using "Steam Play" so that "folks who have already purchased and downloaded the games for PC can download the Mac versions for free."
Also due to hit Mac alongside Steam are Valve's Portal and Runic's Torchlight.
On windows they use a custom win32 scumm interpreter, apparently based off of the win32 interpreter Aaron Giles (MAME) w...
Just as planned. - Steve B., Redmond