Operating Systems

macOS

Definition

macOS is a proprietary graphical operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac computers.

Why It Matters

macOS is known for its user-friendly interface, strong integration with the Apple ecosystem, and popularity in creative fields like graphic design and video editing. Its Unix-based foundation also makes it popular with software developers.

Contextual Example

A graphic designer uses macOS on their iMac to run Adobe Creative Suite applications. They enjoy the seamless integration with their iPhone and iPad via iCloud.

Common Misunderstandings

  • macOS was previously called Mac OS X and then OS X.
  • Under the hood, macOS is a certified UNIX operating system, based on the BSD (Berkeley Software Distribution) family.

Related Terms

Last Updated: December 17, 2025