darlinghq/darling

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Darling is a runtime environment that allows running macOS applications on Linux without a virtual machine. It consists of a Mach-O binary loader and a userspace kernel server (darlingserver) that implements macOS's Mach IPC, POSIX, and Darwin syscall interfaces on top of Linux — along with reimplementations of Apple's frameworks, such as Foundation, AppKit (based on Cocotron), CoreAudio, and CoreFoundation.

Darling's low-level components (XNU, libSystem, Security) are based on Apple's open-source releases. Higher-level frameworks are being actively reimplemented, with many CLI tools already functional. GUI application support is in active development, backed by an AppKit implementation and an initial Metal backend powered by Vulkan translation.

The code of Darling is licensed under GNU GPL 3.0. Individual submodules may be licensed differently, as indicated within each of them.

Official packages for some distributions are available under releases.

For a list of community packages, see the Community Packages section in the Darling documentation.

For build instructions, visit Darling Docs.

Darling has support for DPREFIXes, which are very similar to WINEPREFIXes. They are virtual “chroot” environments with a macOS-like filesystem structure, where you can install software safely. The default DPREFIX location is ~/.darling, but this can be changed by exporting an identically named environment variable. A prefix is automatically created and initialized on first use.

Please note that we use overlayfs for creating prefixes, and so we cannot support putting prefix on a filesystem like NFS or eCryptfs. In particular, the default prefix location won't work if you have an encrypted home directory.

Let's start with a Hello world:

$ darling shell echo Hello world
Hello world

Congratulations, you have printed Hello world through Darling's OS X system call emulation and runtime libraries.

You can install .pkg packages with the installer tool available inside shell. It is a somewhat limited cousin of OS X's installer:

$ darling shell
Darling [~]$ installer -pkg mc-4.8.7-0.pkg -target /

Darling does not support installing .mpkg files yet

The Midnight Commander package from the above example is available for download.

You can uninstall and list packages with the uninstaller command.

DMG images can be attached and detached from inside darling shell with hdiutil. This is how you can install Xcode along with its toolchain and SDKs (note that Xcode itself doesn't run yet):

Darling [~]$ hdiutil attach Xcode_7.2.dmg
/Volumes/Xcode_7.2
Darling [~]$ cp -r /Volumes/Xcode_7.2/Xcode.app /Applications
Darling [~]$ export SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk
Darling [~]$ echo 'void main() { puts("Hello world"); }' > helloworld.c
Darling [~]$ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang helloworld.c -o helloworld
Darling [~]$ ./helloworld
Hello world

Congratulations, you have just compiled and run your own Hello world application with Apple's toolchain.

Xcode is now distributed in .xip files. These can be installed using unxip:

cd /Applications
unxip Xcode_11.3.xip