It you wants to use MacOS themed or macOS similar linux kernel.e., Berkeley
Software Distribution (BSD), then you can use HelloSystem OS, you will get the main bootable iso from Github, but I am sharing you, ready made OvF file, just import and use, no need to install.
You can increase the Hardware Capacity like RAM, HDD STORAGE, or Graphics Memory, but you can minimise, because it is set upto minimum for smooth run.
username is - hemant
password is - <single space bar>
for using...