<Tr> <Td> Dimensions </Td> <Td_colspan="6"> 11.97 in (30.41 cm) wide × 8.36 in (21.24 cm) deep × 0.59 in (1.49 cm) high (13 ") </Td> </Tr> <Tr> <Td_colspan="6"> 13.75 in (34.93 cm) wide × 9.48 in (24.07 cm) deep × 0.61 in (1.55 cm) high (15 ") </Td> </Tr> <P> The macOS operating system has been pre-installed on all MacBook Pros since release, starting with version 10.4. 4 (Tiger). Along with OS X, iLife has also shipped with all systems, beginning with iLife' 06 . </P> <P> The MacBook Pro comes with the successor to BIOS, Extensible Firmware Interface (EFI) 1.1 . EFI handles booting differently from BIOS - based computers, but provides backwards compatibility, allowing dual and triple boot configurations . In addition to OS X, the Microsoft Windows operating system is installable on Intel x86 - based Apple computers . Officially, this is limited to both 32 - bit and 64 - bit versions of Windows XP, Vista, 7, 8, and 10 with the necessary hardware drivers included with the Boot Camp software . Other x86 operating systems such as Linux are also unofficially supported . This is made possible by the presence of the Intel architecture as provided by the CPU and the BIOS emulation Apple has provided on top of EFI . </P>

What operating system does the macbook pro have