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Run macOS 10.15 Catalina (and other versions) in VirtualBox on macOS
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Run macOS 10.15 Catalina (and other versions) in VirtualBox on macOS


Simple script to automatically download, install and run macOS 10.15 Catalina (and other versions) in VirtualBox on macOS. Since VirtualBox does not support booting from APFS volumes, this script is copying the APFS EFI drivers automatically.

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Required Software

The following software is needed.

  • macOS Installer
  • VirtualBox
  • VirtualBox Extension Pack (note: released under the Personal Use and Evaluation License)

Step by Step Video

Two minute summary video:

Short Summary Video

Step by Step

Execute make all to setup and run everything. After the installer reboots, press enter in the terminal to finish the installation.

$ make all
Running checks (around 1 second)....
Creating image '/Users/awi/VirtualBox VMs/macOS-VM.dmg' (around 20 seconds, version 14.2.2, will need sudo)....
Creating iso '/Users/awi/VirtualBox VMs/macOS-VM.iso.cdr' (around 25 seconds)....
Creating VM HDD '/Users/awi/VirtualBox VMs/macOS-VM/macOS-VM.vdi' (around 5 seconds)....
Creating VM 'macOS-VM' (around 2 seconds)....
Adding APFS drivers to EFI in '/Users/awi/VirtualBox VMs/macOS-VM/macOS-VM.vdi' (around 5 seconds)....
Starting VM 'macOS-VM' (3 minutes in the VM)....
Press enter to stop VM 'macOS-VM' (e.g. after installer restarted)....

Ejecting installer DVD for VM 'macOS-VM'....
Starting VM 'macOS-VM' (3 minutes in the VM)....

Customizing your build

Additionally the following parameters can be customized with environment variables:

variable name description default value
VM_NAME name of the virtual machine macOS-VM
VM_DIR directory, where the virtual machine will be stored HOME/VirtualBox VMs/$VM_NAME
VM_SIZE the size of the hard disk 32768
VM_RES monitor resolution 1680x1050
VM_RAM ram size in megabytes 4096
VM_VRAM video ram size in megabytes 128
VM_CPU number of cpu cores to allocate 2

Execute make to get some help:

$ make
Some available commands:
 * all      : run everything needed (check, installer, vm, patch, run, stop, eject)
 * check    : check environment
 * installer: create macOS installer image
 * patch    : add APFS drivers to VM EFI to boot
 * vm       : create VM and disk
 * run      : run VM
 * stop     : stop VM
 * wait     : wait for VM to stop
 * eject    : eject installer medium
 * clean    : delete generated images and downloaded files
 * stash    : delete generated VM and disk
 * test     : test shell scripts
 * style    : style shell scripts
 * harden   : harden shell scripts
 * release  : make new release
 * feedback : create a GitHub issue


  • Graphic Issues
    • Q: Applications such as Apple Maps do not work as expected.
    • A: There is currently no 3D acceleration, therefore some applications do not work.
  • Recovery
    • Q: How do I start the recovery mode?
    • A: Start VM as usual and press CMD+C then you see Trying to find a bootable device... then type fs4: then cd TAB then ./boot.efi (note that using fs4 might be a different one in your case).
  • Installation Loop
    • Q: After starting the installation the VM restarts and I see the installer again.
    • A: You've to press enter in the terminal after the installer restarts.
  • Error Message
    • Q: I get the error code 2, 3, 4, or 6.
    • A: You need to have some software components installed on your machine (VirtualBox, VirtualBox Extension Pack, awk). If you've installed Homebrew, the script will partly install these automatically. Otherwise, you need to install them manually.
  • Reboot
    • Q: I see the message MACH Reboot. What should I do?
    • A: The VM failed to restart. Restart manually. However, this should not happen anymore with the latest version.
  • Kernel Panic
    • Q: I see the message Error loading kernel cache (0x9). What should I do?
    • A: This error is shown from time to time. Restart the VM. However, this should not happen anymore with the latest version.
  • Black Screen
    • Q: When I then boot I don't see anything, just a black screen. What should I do?
    • A: Change the VM version in the settings from Mac OS X (64-bit) to macOS 10.13 High Sierra (64-bit)
  • Other Issue
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