First introduced in 2006, shortly after Apple transitioned the Mac to Intel-based chips, Apple’s Boot Camp multi-boot utility is the secret sauce that has allowed the Mac to be the best-selling PC on Earth.
The proposition Boot Camp offers to would-be Mac buyers is simple. If they buy a Mac, they can run any OS they want: OS X, Windows, or Linux. But if they buy any other laptop, they can never run OS X.
With the release of the latest MacBook Pros, though, Boot Camp just got a little less flexible. Apple has dropped support for Windows 7 from the 2015 MacBook Pro.