With MacOS, there's something called the DFU Firmware Revive/Restore, which is a deep recovery process for unresponsive Macs. To run a DFU Revive/Restore, you have to have another Mac to update or ...
Beginning with 10.7 Lion, Apple stopped distribution of OS X through the usual DVD optical media. Being the first OS deployed specifically through the Mac App Store, a recovery partition was created ...
One of the best features introduced in Lion (OS X 10.7), and available on every version of OS X since, is OS X Recovery. The OS X installer creates an invisible, bootable, 650MB partition—a portion of ...