6 Snow Leopard Retail DVD or ISO (You may need to search for ISO on the Internet) If you are a developer who wants to test several older versions of macOS, then you can try these methods. But there will not be many valid reasons to try an older version of Mac OS 10.6 when we have macOS 11.0 Big Sur now. But still, these methods are applicable for latest version including Windows 10 and VirtualBox 6.x. You may find the older version of products on the screenshots. Note: This post was originally published in the year 2010. But still, we can do some workarounds to install Mac OS X on non-Apple hardware with different bootloaders on Windows computers. So, technically you can virtualize macOS on Apple devices only. From version 3.2, the Oracle VirtualBox officially supports Mac OS X as the guest virtual machine on Apple hardware.
This method is completely for testing and learning purpose. Please buy the original Mac OS and Apple hardware.