Do MacBook have video cards

Macs do have video cards. For example the current range of iMacs have:

▪ 20-inch and 24-inch model with 2.66GHz processor has the NVIDIA GeForce 9400M graphics processor with 256MB of DDR3 SDRAM shared with main memory

▪ 24-inch model with 2.93GHz processor has one of the following: NVIDIA GeForce GT 120 graphics processor with 256MB of GDDR3 memory or NVIDIA GeForce GT 130 graphics processor with 512MB of GDDR3 memory or ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory

▪ 24-inch model with 3.06GHz processor has one of the following: NVIDIA GeForce GT 130 graphics processor with 512MB of GDDR3 memory or ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory