This way, you can go back to the initial state in the future. When the installation is complete, and you have a fresh new macOS VM, you can shut it down and create a snapshot. Increasing this value may help if you run into problems and is also the most effective performance tuning.ĭepending on your hardware, you may also want to increase RAM and the share of CPU power the VM is allowed to use. The default Video Memory of 16MB is far below Apple's official requirement of 128MB. If you want to use it for shortcuts like command+c or command-v (copy&paste), you need to remap or unset the "Host Key Combination" in Preferences -> Input -> Virtual Machine. VirtualBox uses the left command key as the "host key" by default. Go to Utilities > Disk Utility, select the VirtualBox disk, and choose Erase to format it as: In the installer, select your preferred language.ġ. Select the iso created in step 2 when VirtualBox asks for it. In Terminal, run the command VBoxManage modifyvm VM_NAME -cpuidset 00000001 000306a9 00020800 80000201 178bfbff (where VM_NAME is the exact name of the VM set in step 4) so the VM has the right CPU settings for macOS. Under 'Audio', uncheck 'Enable Audio', otherwise the VM may display 'choppy' performance. Under 'Display', increase the Video Memory to at least 128MB, otherwise macOS might not boot correctly, and display performance will be abysmal.Ģ.
Go into the Settings for the new VM you created and:ġ. For Big Sur, the installer requires the disk to have at least 35.3 GB.prepare-iso.sh /Applications/Install\ macOS Sierra\ 2.1\ Beta\ 2.app sierra-2.1-b2įollow the rest of the VM creation wizard and either leave the defaults or adjust to your liking. You can change this using the second parameter. If the script fails to find the installer you can specify its path as the first parameter. Make the script executable and run it: chmod +x prepare-iso.sh &. In this case, you need to use an older Mac to download the older OS. the 2016 MacBook Pro can only download 10.12 Sierra or later). Note: On newer hardware, you might not be able to download older OS releases that Apple doesn't support on the newer hardware (e.g.
(Should work for Yosemite, El Capitan, Sierra and High Sierra, Mojave - 10.10-10.14.) The installer will be placed in your Applications folder. To build a VM running macOS, follow the directions below:ĭownload the installer from Mac App Store (it should be available in the 'Purchases' section if you've acquired it previously). Current macOS version: High Sierra (10.13), tested with VirtualBox 5.2.16 r123759
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