This document provides step-by-step instructions for converting a virtual machine created with Parallels or VMware to Oracle's VirtualBox virtualization software. It details a process of first importing the Parallels virtual machine into VMware Fusion, then copying the machine files from Fusion and adding them to a new virtual machine configured in VirtualBox, allowing one to continue using their existing virtual machine but now under VirtualBox instead. The conversion process takes approximately 30 minutes to complete.