System
1. When referring to an Apple Macintosh, System is the computer's operating system, or MacOS. System is commonly followed by a number, for example, System 7.
- Additional information about Macintosh operating systems can be found on our MacOS help page.
2. When referring to computer hardware, system is often used to distinguish the complete computer as a whole.
3. When referring to software, system is sometimes used to abbreviate operating system.
Also see: Apple definitions, Macintosh, Operating System definitions