Another fellow Mac user here, running Mac OS X Leopard on both an iMac 24" and a MacBook Air.
I don't have any Windows version installed, because most adventures run pretty well in Crossover Games, or are available as a native port.
Maybe a list is a good idea.
Adventures on Mac:
OS X native
Recent games:
1. Ankh – Special Edition
2. Ankh II – Heart of Osiris
3. Ankh III – Battle of Gods
4. Jack Keane
5. A Vampyre Story
6. The Abbey
7. Edna & Harvey – The Breakout
8. Emerald City Confidential
9. CSI: Hard Evidence
10. Bone – Out from Boneville
11. Penumbra: Overture
12. Penumbra: Black Plague
13. Scratches – Director's Cut
14. Penny Arcade Adventures: Episode 1 & 2
15. The Path
Crossover Games
Link:
http://www.codeweavers.com/products/cxgames/
1. Syberia I
2. Syberia II
3. Paradise
4. Still Life – Special Edition
5. Secret Files: Tunguska
6. Broken Sword 2.5
7. Sam & Max Season 1
8. Nikopol
9. Nibiru
I've tested all of the above games (excluding the not-yet released Ankh III and The Abbey) on my Macs and they all run pretty well. In case of COG you sometimes need to handle copy-protection issues (often, game-magazine DVDs don't have any cd-checks, a good, legal way to play some of the classics).
