Do the latest I macs have video cards?

I'm getting sims 3 and you need a video card, thats what my cousin told me (he got it for PC) well I was wondering if a mac has a video card built in. And who ever has sims 3 for it, how does it work. Does it work ok? :D thnk u|||all computers and macs have video cards|||All computer have video card including MACS