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10.4: Create a single Universal binary bootable disk - usb vs firewire
Authored by: johnsawyercjs on May 16, '07 01:49:56AM

OS 10.4.6 (and maybe one or two earlier point versions) and later WILL boot from a PPC Mac's USB port--Apple apparently relented. One limitation: You can't select it for booting in the Startup Disk Prefpane (it will just beep at you)--you have to select it from the Startup Manager, which you invoke at startup by holding down the Option key right after powerup or restart. I've confirmed this works on a slot-loading 350 MHz iMac that didn't even have Firewire ports. The iMac's firmware was version 4.1.9 (which it needs to be anyway, to allow OS X to work on the slot-loading iMac). I didn't test USB OS X booting on an even older, tray-loading iMac, nor did I test booting from a 2.5" USB drive enclosure, nor did I test USB OS X booting on the last of the PPC Macs, so I don't know what the story is there.



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