Point-and click adventures have to be emulated as the genre
has more or less died. The main development after
text-adventures like Zork and the Hithhikers-guide to the Galaxy was the
development of the Script Utility for Maniac Mansion
(SCUMM), by Lucasfilm games. It was the engine for
famous adventures like Monkey Island and Indiana
Jones.
This can be run on a modern Mac (of Palm of PC) using
Scumm VM, which also allows you to
access adventures like Sam and Max which never
appeared on an Apple machine.
Sam & Max.