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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.
The Macintosh contained a single 400 KB, single-sided 3 + 1 ⁄ 2-inch floppy disk drive, with no option to add any further internal storage, like a hard drive or additional floppy disk drive. The system software (Mac OS) was disk-based from the beginning, as RAM had to be conserved, but this "Startup Disk" could still be temporarily ejected.
System 4.0 was released with the Macintosh SE and System 4.1 first shipped with the Macintosh II—these new machines required additional support for the first expansion slots, the Apple Desktop Bus (ADB), internal hard drives and, on the Macintosh II, external color displays and the first Motorola 68020 processor. System 4.0 was the first ...
Nine major versions of the classic Mac OS were released. The name "Classic" that now signifies the system as a whole is a reference to a compatibility layer that helped ease the transition to Mac OS X. [9] Macintosh System Software – "System 1", released in 1984; System Software 2, 3, and 4 – released between 1985 and 1987
The original operating system for the Macintosh was the classic Mac OS, which was introduced in early 1984 as System Software. In 1997, System Software was renamed Mac OS. In 1999, Mac OS X Server 1.0 was released, followed by Mac OS X 10.0, the first consumer release of the Mac OS X.
"About This Computer" Mac OS 9.1 window showing the memory consumption of each open application and the system software itself. Historically, the classic Mac OS used a form of memory management that has fallen out of favor in modern systems. Criticism of this approach was one of the key areas addressed by the change to Mac OS X.
For a list of current programs, see List of Mac software. Third-party databases include VersionTracker , MacUpdate and iUseThis . Since a list like this might grow too big and become unmanageable, this list is confined to those programs for which a Wikipedia article exists.
The Classic features several improvements over the Macintosh Plus, which it replaced as Apple's low-end Mac computer: it is up to 25 percent faster than the Plus, [1] about as fast as the SE, [5] and includes an Apple SuperDrive 3.5" floppy disk drive as standard. [19] The SuperDrive can read and write to Macintosh, MS-DOS, OS/2, and ProDOS ...