Having Mac OS X on a XEN virtual machine
Solution 1:
Theres no known efforts for xen. Primarily because most people who use xen are running it exclusively on linux/x86/amd hardware. BUT other OSS projects, namely 'qemu' and 'virtualbox' have been working at this. It's likely that many of the technical issues you would have to overcome are similar. See: http://forums.virtualbox.org/viewtopic.php?f=4&t=2076&sid=3f507d8a7d8194f37b6dd8a089c919f5
Solution 2:
Useful links:https://github.com/kholia/OSX-KVM
https://github.com/foxlet/macOS-Simple-KVM
https://github.com/munki/macadmin-scripts
Mojave:
#!/usr/bin/env bash
#===========================================================================
# Works only with the official image available in the Mac App Store.
# Make sure you download the official installer before running this script.
#===========================================================================
hdiutil create -o /tmp/Mojave.cdr -size 8000m -layout SPUD -fs HFS+J
hdiutil attach /tmp/Mojave.cdr.dmg -noverify -mountpoint /Volumes/install_build
sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build --nointeraction
hdiutil detach "/Volumes/Install macOS Mojave"
hdiutil convert /tmp/Mojave.cdr.dmg -format UDTO -o /tmp/Mojave.iso
mv /tmp/Mojave.iso.cdr ~/Desktop/Mojave.iso
rm /tmp/Mojave.cdr.dmg
Catalina:
#!/usr/bin/env bash
#===========================================================================
# Works only with the official image available in the Mac App Store.
# Make sure you download the official installer before running this script.
#===========================================================================
hdiutil create -o /tmp/Catalina.cdr -size 8000m -layout SPUD -fs HFS+J
hdiutil attach /tmp/Catalina.cdr.dmg -noverify -mountpoint /Volumes/install_build
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build --nointeraction
hdiutil detach "/Volumes/Install macOS Catalina"
hdiutil convert /tmp/Catalina.cdr.dmg -format UDTO -o /tmp/Catalina.iso
mv /tmp/Catalina.iso.cdr ~/Desktop/Catalina.iso
rm /tmp/Catalina.cdr.dmg
Download the Installer App to you /Applications folder on Mac. Once you have the ISO your halfway there!