In 1996, after more than $400m in research and development, Apple scrapped the release of the code-named Copland update to the operating system.
In 1984, Apple took on the giant of the computing world, Big Blue, also known as IBM. The firm released its Macintosh operating system.
The now famous 60-second advertisement launched a new era of personal computing and brought the graphical user interface, or GUI pronounced as gooey, to personal computers.
Steve Jobs and his insanely great computer won over a cult following and sold lots of computers.
Now more than 15 years after the introduction of the Macintosh, Apple will release not merely an update, but a much-delayed major overhaul of its operating system.
The update is key to the continued recovery of the company.
Losing ground, standing still
A lot has changed since 1984.
This cut into the ease-of-use edge that the Macintosh operating system had as one of its key selling points.
Apple loses its shine
Apple fell on turbulent times, and critical efforts to update the operating system floundered.
In 1996, after more than $400m in research and development, Apple scrapped the release of the code-named Copland update to the operating system.
The company decided to go shopping for a new operating system technology to jumpstart its efforts.
After talks broke off with Be, they bought NeXT for $400m and brought Apple co-founder Steve Jobs back into the fold.
OS X
Copland gave way to Rhapsody, and Rhapsody gave way to Max OS X, pronounced 10.
One disgruntled Mac columnist said that 10 represents the number of years that users have been waiting for the operating system.
The look and feel of the operating have been refined, but the guts of the operating system received the long overdue refurbishment.
Transition underway
Apple says it now has begun a 12-month transition to OS X.
The interface featured a fluid look and powerful graphics technologies based on Adobe's Portable Document Format, OpenGL and Apple's own QuickTime technology.
The interface also has a "dock" that will hold resizable icons for drives, folders, applications and documents.
Guts overhauled
But the interface, in some ways, is window dressing for the major changes inside the operating system.
The new operating system has a new Unix-friendly core, the Mach 3.0 kernel, but does support legacy Mac OS 9 applications. It will also have an object-oriented programming environment inherited from NeXT.
The kernel is based on the BSD version of Unix, "so if you are a Unix hacker, you can go to town," says Lou Mazzucchelli, a long-time Apple analyst with Gerard Klauer Mattison and Company.
The operating system will support protected memory, which for the user means that "applications won't step on each other".
If one application crashes, other applications will continue to run.
Niche or new markets?
Some Apple watchers think that the company might add a business line to its current consumer and professional lines of computers.
But whether Apple tries to extend its reach beyond its traditional graphics, education and consumer-focused markets depends largely on "whether they choose to spend marketing dollars," says Lou Mazzucchelli.
He expects Apple to market OS X as "easier to administer and easier to run" than the competition.
They also might market it to small businesses to run intranets or web servers.
One thing that he believes Apple will not do is to aggressively go after Microsoft.
"They are not going to say throw out your Windows machine. It's too expensive of a war to wage."