MacOS

"It just works."

Apple's macOS (formerly known as Mac OS X, then just OS X), is an Unix-derived operating system that powers their Macintosh computer line. It is the successor to the "classic" Mac OS system.

Macs are known for their ease of use, stylish design, and absurd prices. The system's game library is somewhat limited, compared to Windows, but most major games do get a Mac port these days. Also, by using WINE and Boxer, you can run PC games on a Mac.