Of course, like all PowerPC machines, it can run 10.4 which means it can run Classic - remember, that mode was a feature of the Operating System and not dependent on the actual computer running it, beyond it needing to be a PowerPC machine (Intel machines running 10.4 don’t have Classic.)Īs someone who enjoys the way Macintosh machines used to be Classic would be fun to have on the machine as an option, and since multi-booting a Mac is trivial, there’s no reason I can’t just install 10.4 alongside 10.5! That’s easy. Needless to say, it can only boot into Mac OS X - namely, I believe, 10.4 and 10.5 only – nothing lower. A 2005 2.0GHZ Dual Core machine, the “entry level” of the final generation of PowerPC Macintosh machines to ever be made. With the history lesson out of the way, we come to my G5 machine! In 2007 this feature would be removed in Mac OS X 10.5, but for many vintage Macintosh enthusiasts, it remains a much loved feature of 10.4, especially for Machines which cannot natively boot into Classic MacOS. While a method to port applications using the older API to the new operating system was made to act as a transitional layer for new program releases before their OS X versions would be made, already released versions of programs wouldn’t benefit from this.Įnter “Classic.” This component of Mac OS X was available on all PowerPC OS X versions from 10.0 to 10.4 and basically was a version of OS 9 running alongside OS X, integrated in in such a way that you could run older Macintosh programs, all the way back to the original Macintosh (in theory, if not in practice) nearly seamlessly while inside of OS X! The thing is the way you wrote software for this new operating system was different from the way you wrong programs for the previous Mac OS versions, and with all this mature and in-use software out there, compatibility had to be maintained.
This would be modified into a new version of the Macintosh operating system, known as Mac OS X.
The plan quickly changed to buy out another operating system to use as a base and what was eventually chosen was NeXTStep, a UNIX-like operating system headed by, of all people, Steve Jobs.
Projects to improve and upgrade the operating system ( Taligent, Copland, etc) didn’t go so well, and in combination with other factors damn near bankrupted Apple. To tell its story in simple form, it was a capable operating system but it had some design nuances that didn’t scale well as computers grew more powerful. The “Classic” Mac OS used in various forms from the original Macintosh introduced in 1984 all the way to Mac OS 9.2.2, released in 2001. The Macintosh operating system exists in 2 forms, historically.
If not, I’ll leave some links for reading in the article, but I’ll hope to explain things well enough that it all makes sense on that alone. This article is going to be written presuming you at least know a bit about the history of the Macintosh and Mac OS X in the early years.
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