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As early as Mac OS X v10.5 build 9A466 the community has maintained a version of Leopard that can run on non-Apple hardware. A hacker by the handle of BrazilMac created one of the earliest patching processes that made it convenient for users to install Mac OS X onto 3rd party hardware by using a legally obtained, retail version of Apple Mac OS ...
Only UMAX ever obtained a license to ship Mac OS 8 and get Mac OS 8 upgrade disks, which expired in July 1998 (Power Computing also got Mac OS 8 disks by their acquisition by Apple). [19] All other manufacturers had their Macintosh clone contract terminated by late 1997 and either continued their brands as PC clones or discontinued them ...
Darwin is the core Unix-like operating system of macOS, iOS, watchOS, tvOS, iPadOS, audioOS, visionOS, and bridgeOS.It previously existed as an independent open-source operating system, first released by Apple Inc. in 2000.
Rosetta is a dynamic binary translator developed by Apple Inc. for macOS, an application compatibility layer between different instruction set architectures.It enables a transition to newer hardware, by automatically translating software.
A hardware compatibility list is a database of hardware models and their compatibility with a certain operating system. HCLs can be centrally controlled (one person or team keeps the list of hardware maintained) or user-driven (users submit reviews on hardware they have used).
Mac OS 9.0.4 was a collection of bug fixes primarily relating to USB and FireWire support. Mac OS 9.1 included integrated CD burning support in the Macintosh Finder and added a new Window menu in the Finder for switching between open windows. Mac OS 9.2 increased performance noticeably and improved Classic Environment support.
The original Mac OS used Pascal as its primary development platform, and the APIs were heavily based on Pascal's call semantics.Much of the Macintosh Toolbox consisted of procedure calls, passing information back and forth between the API and program using a variety of data structures based on Pascal's variant record concept.
For another example, Mac OS X on the PowerPC had the ability to run Mac OS 9 and earlier application software through Classic—but this did not make Mac OS X a binary compatible OS with Mac OS 9. Instead, the Classic environment was actually running Mac OS 9.1 in a virtual machine, running as a normal process inside of Mac OS X. [1] [2]