Apple's first operating system was Apple DOS which came out in 1978. This went through various revisions until 1983 when they concentrated on the Macintosh system which launched in 1984 and went from System 1 to System 7 when it became known as Mac OS 7 in 1997. Mac OS 9 was the last release of the "classic" Mac OS before the arrival of Mac OS X in 2001.
On January 24, 1984, Apple Computer, Inc. (now Apple Inc.) introduced the Apple Macintosh personal computer, with the Macintosh 128K model, which came bundled with the Mac OS operating system.
Apple's eMac was introduced in April 2002.
Which operating system will work on Apple Macintosh computers depends on the CPU of the computer. Apple computers with PPC CPUs can run Apple's OS 9 Intel CPU computers can run Apple's OS X, and using Boot Camp, can also run Linux and Microsoft's Windows XP operating systems.
The PowerBook G4 was introduced in January 2001 and would have originally had Mac OS 9 installed. The first version (10.0) of Mac OS X, known as Cheetah, was introduced in March 2001.
Google Inc. Introduced Android OS
Initial releases:System 1: January 24, 1984Mac OS 8: July 26, 1997OS X: March 24, 2001On January 24, 1984, Apple Computer Inc. (now Apple Inc.) introduced the Macintosh personal computer, with the Macintosh128K model, which came bundled with what was later renamed the Mac OS
In 1984 Apple introduced the graphical user interface (GUI) for the Macintosh.
Mac OS X is the OS used on Apple's Macintosh computers.
Mac OS X (Cheetah) was introduced on 4 March 2001 having been developed since 1997.
Apple's Mac OS X is legally only used on Apple Macintosh computers.
It was first introduced on the market in April 1977.
Apple's Mac OS X email client is called Mail.