Open firmware security for Mac workstations
When Apple Computer Inc. introduced Open Firmware with the first G3 Macintosh computers, it was big news because it allowed Apple to easily modify system information previously stored in ROM. This meant that revisions made to ROM code after a computer had been manufactured and sold could still be applied to that computer. It also meant that Apple didn't need to patch the operating system to work around older ROM data. It wasn't until Apple introduced the iMac in 1998 that Open Firmware gained common use.
By Ryan Faas at Computerworld.
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