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Examples include Classic Mode in Mac OS X and compatibility mode in Microsoft Windows, which both allow applications designed for older versions of the operating system to run. Other examples include Wine to run Windows programs on Linux / OS X and Mono to run .NET programs on various Unix-like systems.
Some programs allow the conversion of Java programs from one version of the Java platform to an older one (for example Java 5.0 backported to 1.4) (see Java backporting tools). Regarding Oracle's Java SE support roadmap, [ 4 ] Java SE 23 is the latest version, while versions 21, 17, 11 and 8 are the currently supported long-term support (LTS ...
In the mid-1990s, Mac OS was falling behind Windows. [3] In 1993, Microsoft had introduced the next-generation Windows NT, which was a processor-independent, multiprocessing and multi-user operating system. [4] At the time, Mac OS was still a single-user OS, and had gained a reputation for being unstable.
An emulation layer called Blue Box allowed Mac OS applications to run within an actual instance of the Mac OS and an integrated Java platform. [1] The Objective-C developer tools and Frameworks were referred to as the Yellow Box and also made available separately for Microsoft Windows.
A software platform can be either an operating system (OS) or programming environment, though more commonly it is a combination of both. An exception is Java, which uses an OS-independent virtual machine (VM) to execute Java bytecode. Some software platforms are: Android (ARM64) ChromeOS (ARM32, ARM64, IA-32, x86-64)
The first release of the new OS — Mac OS X Server 1.0 — used a modified version of the Mac OS GUI, but all client versions starting with Mac OS X Developer Preview 3 used a new theme known as Aqua. Aqua was a substantial departure from the Mac OS 9 interface, which had evolved with little change from that of the original Macintosh operating ...
Discontinued; Previously bundled with hardware; No longer a separate operating system, but a group of services installed atop any version of macOS Monterey; US$19.99 on the Mac App Store Proprietary higher level API layers; open source core system (Intel-PowerPC versions): APSL, GNU GPL, others
XNU ("X is Not Unix") is the computer operating system (OS) kernel developed at Apple Inc. since December 1996 for use in the Mac OS X (now macOS) operating system and released as free and open-source software as part of the Darwin OS, which, in addition to being the basis for macOS, is also the basis for Apple TV Software, iOS, iPadOS, watchOS, visionOS, and tvOS.