The Unix underpinnings of Mac OS make it feel familiar and accessible to programmers used to working in Unix-like environments. Apple’s Xcode IDE and other development tools are thoughtfully crafted ...
The first Mac software was called System 1 and it was released on January 24, 1984, and there have been 30 major updates since. Apple rebranded to Mac OS with the release of mac OS 8 on July 26, 1997.