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It is possible to run macOS as a virtual machine inside other operating systems installed on standard PC hardware by using virtualization software such as Oracle's VirtualBox [87] [88] (though this is not officially supported by Oracle [89]).
Macs with Intel processors can run Linux through virtualization or through dual-booting. Common virtualization tools for Intel Macs include VMware Fusion, Parallels Desktop, and VirtualBox. [8] In 2010, Whitson Gordon from Lifehacker noted that Apple has streamlined the process of dual booting Windows on Macs, but not for Linux.
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.
Virtual PC – full virtualization software allows running other operating systems, such as Windows and Linux, on PowerPC Macs (discontinued in 2007) VirtualBox; vMac – emulates a Macintosh Plus and can run Apple Macintosh System versions 1.1 to 7.5.5.
JavaFX is a software platform for creating and delivering desktop applications, as well as rich web applications that can run across a wide variety of devices. JavaFX has support for desktop computers and web browsers [citation needed] on Microsoft Windows, Linux (including Raspberry Pi), and macOS, as well as mobile devices running iOS and Android, through Gluon Mobile.
VirtualBox supports both Intel's VT-x and AMD's AMD-V hardware-assisted virtualization. Making use of these facilities, VirtualBox can run each guest VM in its own separate address-space; the guest OS ring 0 code runs on the host at ring 0 in VMX non-root mode rather than in ring 1. [citation needed]
Cycada (formerly known as Cider, and Chameleon before [1]) is a compatibility layer that aims to allow applications designed for iOS to run unmodified on the Android operating system. [2] The method uses compile-time adaptation to run unmodified code with minimal implementation effort. [3]
As with KQEMU, VirtualBox runs nearly all guest code natively on the host via the VMM (Virtual Machine Manager) and uses the re-compiler only as a fallback mechanism – for example, when guest code executes in real mode. [22] In addition, VirtualBox did a lot of code analysis and patching using a built-in disassembler to minimize recompilation.