... and audio work.
While a lot of kids use PCs, the VAST majority of musicians and producers use Macs. It's more than just a computer "good for graphics" -- it's the whole UI experience that just feels more "cooperative."
That's because the OS was actually carefully designed by HCI (Human Computer Interaction) engineers to account for how the human brain works, and then work with it. Windows was basically a slapped-together shell with little thought of the people who would be using it.