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The history of macOS, Apple's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. That system, up to and including its final release Mac OS 9 , was a direct descendant of the operating system Apple had used in its Mac computers since their ...
Note that most old programs can still be run using emulators, such as SheepShaver, vMac, or Basilisk II. For a list of current programs, see List of Mac software . Third-party databases include VersionTracker , MacUpdate and iUseThis .
last Mac OS release to run on a 68k processor, and it added support for USB on the iMac and added support for the HFS+ filesystem, also called Mac OS Extended Mac OS 8.5 first version to run solely on a PowerPC processor, and it added built-in support for FireWire. It also added Sherlock and added support for the Power Macintosh G3: Mac OS 8.5.1
Mac OS X Server 10.5 – also marketed as Leopard Server; Mac OS X Server 10.6 – also marketed as Snow Leopard Server; Starting with Lion, there is no separate Mac OS X Server operating system. Instead the server components are a separate download from the Mac App Store. Mac OS X Lion Server – 10.7 – also marketed as OS X Lion Server
The Macintosh "System 1" is the first major release of the classic Mac OS operating system.It was developed for the Motorola 68000 microprocessor.System 1 was released on January 24, 1984, along with the Macintosh 128K, the first in the Macintosh family of personal computers.
Since the Old World ROM usually boots to Toolbox, most OSs have to be installed using a boot loader from inside Mac OS (BootX is commonly used for Linux installations). 68K-based Macs and NuBus Power Macs must have Mac OS installed to load another OS (even A/UX, which was an Apple product), usually with virtual memory turned off.
The Classic uses the System 6.0.7 operating system with support for all versions up to System 7.5.5. A hidden Hierarchical File System (HFS) disk volume contained in the read-only memory (ROM) includes System 6.0.3. [20] The Mac Classic can be booted into System 6.0.3 by holding down the ⌘ Command+⌥ Option+X+O keys during boot. [20]
The Macintosh Toolbox implements many of the high-level features of the Classic Mac OS, including a set of application programming interfaces for software development on the platform. The Toolbox consists of a number of "managers," software components such as QuickDraw , responsible for drawing onscreen graphics, and the Menu Manager, which ...