Apple–Intel architecture
| Mac transition to Intel processors |
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The Apple-Intel architecture is an unoffical name used for Apple Macintosh personal computers developed and manufactured by Apple Computer that use Intel x86 processors, rather than the PowerPC and 68k processors used in their predecessors.
Technologies
Apple uses a subset of the standard PC architecture, which provides support for Mac OS X and limited support for other operating systems. Hardware and firmware components that must be supported to run an operating system on Apple-Intel hardware are listed below.
Extensible Firmware Interface
Extensible Firmware Interface (EFI) is the firmware-based replacement for the PC BIOS from Intel. Designed by Intel, it was chosen by Apple to replace Open Firmware, used on PowerPC architectures. Since many operating systems, such as Windows XP and many versions of Windows Vista are incompatible with EFI, Apple has released a firmware upgrade with a compatibility support module that provides a subset of traditional BIOS support with their Boot Camp product.
GUID Partition Table
GUID Partition Table (GPT) is a standard for the layout of the partition table on a physical hard disk. It is a part of the Extensible Firmware Interface (EFI) standard proposed by Intel as a substitute for the more common PC BIOS. The GPT replaces the Master Boot Record (MBR) used with BIOS.
See also
Notes