You may have only learned about Apple in recent years. Macbook series was released in May 2006 and evolved from iBook. IBook is the predecessor of the macbook, so Apple's notebooks used to start with I, but after the macbook, Apple gave up the CPU provided by IBM and switched to Intel's CPU. Many other aspects have also improved. The new name represents a new brand strategy. The early MAC was different from Pc, and its name specifically referred to Apple's own computer. However, because Apple uses Intel processors, the MAC is not much different from the PC in essence. I hope you are satisfied with my answer.