see: https://www.home-assistant.io/installation/macos/
If you need to increase size of disk after setup (16000 is in MB):
VBoxManage modifymedium disk /path/to/haos_generic-aarch64-16.3.vmdk --resize $SIZE_IN_MEGABYTES
VBoxManage modifymedium disk /path/to/haos_generic-aarch64-16.3.vmdk --resize 16000