I loved this game on the PC way back in the early 90s! Still have the boxed game (somewhere…)

Medford, Oregon – Trilobyte Games, LLC today is pleased to announce that The 7th Guest is now available in the Mac App Store. The classic game sells for $9.99 in all Mac App Store supported countries and runs on Snow Leopard and Lion. First released in 1993 on the PC and Mac, and in 2010 on the iPhone, The 7th Guest is a challenging game that withstands the test of time. This release is built for Mac OS X and brings the game to a modern platform while maintaining its original appeal.
The 7th Guest is also available for PC from Dotemu and GOG and for iPhone/iPad in the iTunes App Store. The sequel, The 11th Hour is available from Dotemu and GOG for PC only.

Source & more info at Trilobyte Games Releases The 7th Guest for Mac App Store