Recommended:

OS: Mac OS X 10.4, 10.5, and 10.6
Processor: PowerPC G5 or Intel
CPU Speed: 2.0 GHz
Memory: 1GB or higher
Hard Disk Space: 3.5 GB free disk space
Video Card: (ATI): Radeon 9600 Video Card (NVidia): GeForce FX 5200
Video Memory: (VRam): 128 MB
Multiplayer: Internet (TCP/IP) and LAN (TCP/IP) play supported. Internet play requires broadband connection.
Media Required: CD Drive
NOTICE: Apple original CPU’s only, CPU upgrades not supported.
NOTICE: Intel integrated video chipsets (GMA 950) are not supported. Supported Video cards: NVIDIA GeForce 5200, 6600, 6800, 7300, 7800 ATI Radeon 9600, 9650, 9700, 9800, X600, X800, X1600, X1900
REQUIRED: FULL VERSION OF Civilization IV for Mac OS X TO PLAY

Civilization IV: Warlords videos