proprietary license or the GPL free software license and is used by default when running Docker images of other operating systems VMware offers a product similar to Parallels called Fusion, released August 2007. VMware's virtualization product also allows users to use installations of Windows XP and later under OS X. Regardless of the product used, there are inherent limitations and performance penalties in using a virtualized guest OS versus the native macOS or booting an alternative OS solution offered via Boot Camp. See also Mac transition to Intel processors References and notes External links Intel EFI open-source implementation, code-name 'Tiano' Macintosh platform IBM PC compatibles 32-bit computers 64-bit computers