I'm working on interviewing one of the guys that did that Pathways Into Darkness port. He used to work at Freeverse.
This is precisely what the currently-defunct
Mac Classics Reborn series is/was for.
Here's a list of all the classic Mac games ported/remade for OS X that I can think of:
Pathways Into Darkness
Marathon 1, 2, 3 (
Aleph One)
Glider (there's also a PPC OS X build of Glider Pro)
StuntCopter
SimStapler (that's a direct download link)
Dark Castle (
Return to Dark Castle)
Bolo (
XBolo)
Apeiron
Bubble Trouble
EV Nova
Maelstrom
The Fool's Errand also has an OS X sequel,
The Fool and his Money
There are some others that are PPC only, and are getting hard to find.