If your Mac has multiple bootable disks—via either a partitioned internal disk or external FireWire drives—you’re probably very familiar with the Startup Disk System Preferences panel.

also make sure the partition type is set to "GUID Partition Table," otherwise it won't be able to boot an Intel-based Mac. Drag and drop the "InstallESD.dmg" into the "Source" box in Disk Utility.

On Apple computers, Target Disk Mode is a special boot option that allows the system's hard drives to be accessed with a FireWire cable (also with a Thunderbolt connection for newer systems).

Apart from the default startup disk, Mac computers can be set to start up from a different disk like an external drive, network volume, or a USB flash drive. This article explains the process for ...

Full security, enabled by default, provides the same best-in-class security as enjoyed by Apple's iOS devices and let users boot from an external disk without reducing the security of the system.

Boot Camp 1.1.2 lets users install Windows XP on any internal disk; adds support for built-in iSight cameras and microphones; supports Apple’s USB modem, trackpad scrolling and right-clicking on ...