The Classic Mac OS ( System Software) series that consists of operating systems released between 1984 to 2001, starting with System 1 and ending with Mac OS 9.The family is separated into two distinct series: Although there are certain 'regular' PCs that can run the operating system (know as 'Hackintoshing') it is highly controversial due to violating Apple's end-user license agreement and being notoriously inconsistent in its results.
MacOS is a family of operating systems developed by Apple and exclusively available to Apple's own family of personal computers known as Macintosh (or Mac for short).
