This unfortunately seems to be incompatible with steps 1-6. You'll get a very primitive version of the present day Boot Selection screen, WHICH ONLY WORKS WITH A MOUSE ! There you'll find the USB Stick and be able to boot from it, and install as if it were a very speedy and silent DVD drive :)įor those wishing to install Mac OS X 10.4 Tiger, the ISO floating around for that seems to contain a very small Apple_Driver_ATAPI partition (disk2s2 in step 4), a few KB instead of half a GB. Plug this into your G5 Cube, and, at boot, press both ALT keys (theoretically one should work but with my wireless keyboard the both button approach works best) At the end, diskutil list should show something like this: Depending on your stick, this might take upwards of a few hours (even with a badass USB3 one!).Now we can copy over the Mac OS X 10.5 Leopard ISO with dd: sudo dd if=// of=/ bs=32768 conv=notrunc,noerror,sync.The deeply cleansed disk should appear like so ( diskutil list) The entire process should look something like this: Now let's for the sake of it nuke the FAT32 partition: sudo pdisk L e /dev/rdisk2 d 2 w and exit CTRL+C.diskutil list should bring something like this up: I formatted my USB thumb drive in Disk Utility with Apple Partition Map and a MS-DOS (FAT) partition.

What worked for me on a Cube G4 was the following (based on Joshua's advice): The alias will be resetted to default at the next cold boot and thus you will have to repeat the procedure for every USB-boot. You can just choose a default kernel entry - *finnix in my case - and it will boot properly. on the ISO)ģ.) Quick and dirty workaround: overwrite the cd alias in OF with the path to your USB Key (copy the path from the ud alias): devalias cd Now boot with boot cd:2,\yabootĥ.) No problem anymore with hardcoded cd alias - it's now poiting to your USB Key. (the cd alias is hardcoded inside files like ofboot.b, nf. This ud alias maps to You can call yaboot with boot ud:2,\yaboot - but then the kernel will panic because it still searches his initrd + rootfs somewhere at cd:2,/. I used the finnix ppc rescue ISO, dumped with dd to the usb key.ġ.) OF creates the devalias ud for the usb key in the left port. On a Powerbook G4 A1138 (1,67 Ghz 15' late 2005) the above instructions didn't work out of the box.

This thread is old, but i want to add some information that may be useful:

Boot mac from usb