Ubuntu has a Snap package that can run MacOS on KVM. It is a pre-built script that bring out the MacOS up and running automatically.

There are plenty of notes on the web, this passage is just my personal notes.

Pre-Requisite – install KVM utils and assign a common user to KVM group

sudo apt-get install cpu-checker qemu-utils
sudo usermod -a -G kvm,libvirt jimmy
sudo chown root:kvm /dev/kvm
sudo chmod 666 /dev/kvm

Install Sosumi

sudo snap install sosumi --edge

Adjust the default CPU cores, RAM size and disk image size

# Try to launch the VM as a normal user
sosumi 
# immediately close the VM at Clover
# go to snap folder and edit the launch file
cd ~/snap/sosumi/common
nano launch
#modify -m 8G / -smp 8,core=4
qemu-img resize macos.qcow2 +20G

Launch the VM and carry out the standard installation process.

sosumi