Basic time line
June 1978- Apple introduces Apple DOS 3.1, the first operating system for the Apple computers.June 1978-Apple release System 1-71984-1991-Apple introduces Mac OS 8. the biggest step to modern Mac OS’s1997- Apple buys NeXT Software Inc. for $400 million and acquires Steve Jobs, Apples cofounder, as a consultant.1997- Apple introduces Mac OS 9.1998-Present-Apple introduce Mac OS X.
•The first version of the Mac OS (called System) is different from other operating systems from the same time period because it does not use a basic command line interface; it was one of the first operating systems to use an entirely graphical user interface.
•These releases could only run one application at a time. •System 2.1 introduced the HFS which had real directories, Allowing users to Properly play around with their Computers.
•System Software 5 added MultiFinder, an extension which let the system run several programs at once. The system used a multitasking model, meaning that time was given to the background applications only when the running application had control. •This was arguably the biggest step for apple since their beginning.
System 7 & Virtual memory
•System 7 was very important to apple as it supported 32-bit meomory, Allowed users to easily create folders and gave way to the apple home menu. But s the most significant feature of System 7 was virtual memory support, which previously had only been available as a third-party add-on.
•OS X is the tenth major version of Apple's operating system for Macintosh computers. Previous Macintosh operating systems were named using numbers, e.g. Mac OS 8 and Mac OS 9. The letter X in OS X's name refers to the number 10, •OS X is a Unix-based operating system built on technology developed at NeXT from the second half of the 1980s until early 1997.