I'm typing this on a Dell Mini 10V that I'm running as a mac with OSX and it works great! Between the four members of our family we also have a macbook pro, a macbook, an ibook G4 and if I wanted to plug it in, our old imac dv from 1999 it'd still work - I had it running OSX, too.

Add to that one original iphone i'm still using (funny people were criticizing the iphone when it came out because apple didn't design it so we could change the battery ourselves: this thing is three years old and the battery still works fine!), one iphone G3, an ipod touch, two ipod nano's and the latest ipod shuffle and it's safe to say we've been very happy with Apple products.