Qemu-img create -f qcow2 /home/kvm-images/yose.qcow2 80G This can be done from the KVM virtual manager GUI or from the command line: Once you have a good ISO image, the next step is to create a "qcow2" disk image to be used for the OSX install. iso osx.iso -method 2 -verify (see notes i, ii) create_osx_install_iso.sh -app /Applications/Install\ OS\ X. For this, Pacifist (note vii) is used to extract the "Kernels" folder, and "create_osx_install_iso.sh" (note viii), run as root on a physical OSX system, is used to create the ISO:Įxtract the "Kernels" folder from the OSX install app you want to create an ISO for into the current directory (use Pacifist search to find the folder) Some symlinks must be replaced with actual files and the kernel image must be extracted from a pkg and inserted into the right place. Unfortunately, creating a good ISO boot image for OSX is harder than one would like, and the layout of each of the OSX Installer apps makes this error prone. ISO supported by all hardware (virtual or physical).The reasons we use ISO images instead of some other image are: One of the most important aspects to running OSX on QEMU/KVM is creating a good ISO image from which to install. Since then, they only distribute installation apps (see note vi). Bootable ImageĪpple stopped distributing OS DVDs with Snow Leopard (OSX 10.6). After extracting the boot loader, we give it a descriptive name and save it for later use by QEMU. The application we used to extract the boot loader from the Chameleon package is Pacifist (note vii). We obtain the boot loader by downloading the Chameleon (note v) package and extracting the boot loader from it (note i). This newer boot loader was modified to support Sierra. The older bridge BIOS (chameleon) is usable by releases up to and including 10.10 but with 10.10 this development was forked and a new boot loader was created (enoch) for El Capitan. The first task when considering adding a new OSX release is to check to see if people have had success using the bootloader used with the previous version of OSX or if a new boot loader is required. This boot loader acts as a bridge between SeaBIOS of QEMU/KVM and the BIOS expected by Apple (EFI BIOS). Yosemite (OSX 10.10), El Capitan (OSX 10.11) and Sierra (OSX 10.12) all require an intermediate boot loader. A Mac Mini is capable of running Linux plus one virtual guest. The Mac Pro can easily run Linux and three OSX guests. Our hardware currently consists of several Mac Minis and one Mac Pro. Our approach is to install Linux on the base Apple hardware and run three virtualized OSX images on QEMU/KVM. Our reading of the Apple OSX EULA is that it allows up to three versions of OSX to be installed on Apple hardware in expectation that this procedure will be useful for development and testing of new software which runs on OSX. Virtualized OS images are a nice solution for this problem. By the time a patch is created, third-party packages which support building CASA for the upcoming release. This is not typically done for old releases, but it is not unusual for patches to be created for the last CASA release. This allows us to retireve a particular OSX operating system image and create patches for previous CASA releases. Our goal with creating virtualized OSX build and test systems is to allow us to backup, restore and archive the build OSX state for CASA releases.
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