VirtualBox is a full virtualizer available on macOS, Windows, and Linux. When you install an operating system in VirtualBox, you're not dual-booting the new OS alongside the original one.

Although we're using Windows 7 64-bit as our base OS, VirtualBox runs on nearly any OS, and these tips and tricks are applicable to any serious VirtualBox setup.

If you're on Windows, need to use OS X, but don't want to buy or build a new computer, reader Bobby Patton shows us how to run Snow Leopard in a virtual machine on Windows with just a few tweaks.

It wasn't a VirtualBox limitation, but an OS X... I know that VMWare won't let me create a VM of 10.6 unless it is from 10.6 Server install media.