Rally Masters throws you into the Michelin Race of Champions by setting new standards in driving physics, graphical presentation and depth of game play. Choose from over 17 real licensed rally cars including: Mitsubishi Lancer, Skoda Octavia WRC, Peugeot 306F2 Evo, Citroen Xsara Kit Car, Renault Megane Kit Car, Lancia HF Delta Intergale, Lancia Stratos and race them on more than 40 tracks based on real world locations.

Notes:
The resolution has been fixed at 1024×768 pixel.
To edit it go to /Users/YOU/Library/Application Support/Rally masters/Bottles/ choose user.reg and UNLOCK it in the get info window.

Then open it and search for these lines:

“GfxDisplayHeight”=dword:00000300
“GfxDisplayWidth”=dword:00000400

The resolutions are hex values – use Calculator.app to convert decimal to hexadecimal values.

edit the lines accordingly and save the file then lock it again or the game WILL CRASH after startup!

Known Issues:
The user.reg file MUST stay locked or the game will crash randomly upon startup!
No other issues detected as of yet – enjoy!

Requirements:
Mac OS version: OS X 10.4.11
Min. Processor: Intel Core Solo
Min RAM: 512 MB
Video RAM: 64 MB
Harddisk space: 350 MB

Please note that this game has not been tested on Macs with GMA 950 chips, but it is likely to work.

Pics:

Link to forum post (You need 3+ posts to view this topic!)
Please note that this port is not Snow Leopard compatible but you can grab an updated wrapper at this location:
CXSkin Wrapper