- Disk utility for mac boot from cdrom how to#
- Disk utility for mac boot from cdrom mac os x#
- Disk utility for mac boot from cdrom drivers#
- Disk utility for mac boot from cdrom driver#
cmd-opt-shift-delete-# - Boot from a specific SCSI ID # (# = SCSI ID number).For SCSI devices it searches from highest ID to lowest for a partition with a bootable system.
Disk utility for mac boot from cdrom driver#
This actually forces the system to NOT load the driver for the default volume, which has the side effect mentioned above.
Disk utility for mac boot from cdrom mac os x#
cmd-x (or just x?) - Will boot into Mac OS X if 9 and X are on the same partition and that's the partition you're booting from.cmd-opt - Hold down until 2nd chime, will boot into Mac OS 9 ?.opt - Bring up OF system picker on New World machines.mouse down - Eject removable media ( I think Boot ROMs prior to 2.4f1 excluded the CD drive ).I have the next list of magical boot key sequences: I figured my trick was shot as soon as the Duo Core machines came out, but I now realize there are quite a few people with PPC Macs that might be able to use this hint.
Disk utility for mac boot from cdrom how to#
So the two ways that I know how to enable it are through terminal by using the nvram command, and directly in Open Firmware. In the optional boot menu (reached by holding down the Option key during boot), it also will not show. So in System Preferences, the USB disk will not be shown as a bootable drive. If the firmware cannot list the contents of the drive, it seems it cannot boot off of it.Īs you should know (thanks to the owner of the iMac G5 w/iSight for letting me know I should mention this), USB2 booting is not supported, therefore you should remember OS X has no support for booting USB 2 and the firmware has no support. If this fails, there is a remote possibility that you can still boot off of USB2, but you may need to substitute ud for or something similar. The command would be similar to this: nvram boot-device ud:3,\\\\:tbxiNow this looks a tad bit different then what we typed in Open Firmware, but that's because we have to escape the two backslashes, each with a backslash of its own. Something like: boot-device ud:3,\\:tbxi hd:,\\:tbxi"Īnd now some more fun, there is a Unix script that can be written to enable this, because after all we are only changing a nvram variable. Type printenv boot-device, and you should see the change displayed already.Type setenv boot-device ud:3,\\:tbxi where the number after the colon corresponds to that partition number we found in step two.Now type printenv boot-device, which will usually get you output of boot-device hd:,\\:tbxi.Again, if you see this, I have not had this fail yet. If found, it will usually have beside it or something similar. In this list, look for ud, usually below where you see hd ( ud is "USB Disk," I presume). In Open Firmware, type devalias, and you should get a list as output. If this step does not work, I have had very limited success getting a machine to boot off USB2. Hold Command-Option-F-F right after the machine is turned on. Start up the machine in Open Firmware (this is the fun part).There are other ways of finding this out, but in my case, my disk is disk2s3 (the 3 on the end will come into play soon).
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Disk utility for mac boot from cdrom drivers#
disk3s9 might be a USB disk with OS 9 drivers that is considered the third disk. That is, disk2s3 is usually for a USB disk with no OS 9 drivers installed that is the second disk disk. I usually find this by going to Disk Utility and looking at the info for the partition on the USB disk with OS X.
![disk utility for mac boot from cdrom disk utility for mac boot from cdrom](http://cvad-mac.narod.ru/pic/bdu/BdU2.about.png)
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iMac G5 w/iSight (thanks to the eager user who emailed me).Machines that I have tested this hint on and made it work are: Thankfully, somewhere about the time the iMac G5 with the ambient light sensor (ALS) was released, Apple tweaked their Open Firmware, which allowed us to boot PowerPC Macs from USB2 drives. First off, I have tried and tried again over the years to boot various PowerPC Macs via a USB2 disk.