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Rhapsody's version numbers start at version 5.0, since was a rename of NeXT's OPENSTEP for Mach operating system, whose last version was OPENSTEP for Mach 4.2. Though Apple never released Rhapsody 5.2, some speculated that it was meant to be Rhapsody Premier. [citation needed]
Rhapsody was OPENSTEP for Mach with a Copland appearance from Mac OS 8 and support for Java and Apple's own technologies, including ColorSync and QuickTime; it could be regarded as OPENSTEP 5. Two developer versions of Rhapsody were released, known as Developer Preview 1 and 2; these ran on a limited subset of both Intel and PowerPC hardware.
At first, the plan was to develop a new operating system based almost entirely on an updated version of OPENSTEP, with the addition of a virtual machine subsystem — known as the Blue Box — for running "classic" Macintosh applications. The result was known by the code name Rhapsody, slated for release in late 1998.
To do this, Apple took useful code from the OpenStep platform and re-implemented the core functionality in a pure-C library known as Core Foundation, or CF for short. OpenStep's libraries calling CF underlying code became the Cocoa API, while the new Mac-like C libraries became the Carbon API. As the C and Obj-C sides of the system needed to ...
0.1 is contrived (for sorting and identification) as this identified itself simply as Rhapsody 5.3; 0.2 April 14, 1999 Mac OS X Server 1.0.1 0.3 August 5, 1999 Based on Rhapsody 5.5 ISO image is available on archive.org; After this point the kernel changed from the NeXTSTEP/OPENSTEP/Rhapsody to the newer XNU for Mac OS X; 1.0 April 12, 2000
OpenStep, an open platform version of NeXTSTEP originated by Sun Microsystems and NeXT Rhapsody (operating system), the Apple Macintosh NeXTSTEP/classic Mac OS hybrid predecessor to macOS Darwin (operating system), the open source version of macOS; GNUstep, an open source version of NeXTSTEP originated by the GNU Organization
[46] The project to port NeXTSTEP to the Macintosh platform was named Rhapsody and was to be the core of Apple's cross-platform operating system strategy. This would inherit OpenStep's existing support for PowerPC, Intel x86, and DEC Alpha CPU architectures, and an implementation of the OpenStep libraries running on Windows NT. This would in ...
OPENSTEP; QNX (POSIX, microkernel OS; usually a real time embedded OS) Rhapsody (an early form of Mac OS X) RISC iX – derived from BSD 4.3, by Acorn computers, for their ARM family of machines; RISC/os (a port by MIPS Technologies of 4.3BSD for its MIPS-based computers) RMX; SCO UNIX (from SCO, bought by Caldera who renamed themselves SCO Group)