So last week I bought a DVD (from eBay), which was supposed to be or I had assumed to be a Mac OS X Yosemite installer. I wanted to use this DVD to install Mac OS X Yosemite into VirtualBox on my Windows 8.1 PC. Unfortunately, I was unable to do it, even after I tried to convert the DVD into an ISO, and also tried to convert the DVD into a USB "bootable" drive. Nothing worked. I even tried to install the DVD into VMWare, also with no success. If anyone has any suggestions or can offer help on this matter, it would be greatly appreciated. Thanks!