John, New World Macs are not designed to boot from USB at all, even if some folks have found ways to do it. CDs are cheap. Burn an install CD and boot from it by holding down the 'c' key on the keyboard while powering-up the Mac. This works with Apple-brand keyboards; not all third-party keyboards work for booting from CD.
All my best - Chris Reich; Rochester, New York twittername: chrisreich --- On Fri, 6/24/11, John Ames <[email protected]> wrote: From: John Ames <[email protected]> Subject: How to install on Power Mac G5 from USB stick To: [email protected] Date: Friday, June 24, 2011, 7:42 PM I've got a Power Mac I'd like to run Debian on, but while the install files are easy enough to find, I've been having a devil of a time figuring out how I'm supposed to boot the thing from USB. There are several articles on booting New World Macs from USB that Google turns up, but they seem very cursory and specific to the author's particular machine, and as such aren't a whole lot of help. What I'm trying to figure out is: A. What exactly I need to do to get a suitable boot filesystem written to my USB stick. It's a spare, so I'm not worried about destroying it, but simply writing the powerpc64 netboot ISO doesn't seem to work, unless I'm screwing up on step... B. How to actually boot the thing from Open Firmware. I can find the device path it assigns to the USB stick, but when I attempt to boot it, it goes to a "no" sign on a grey screen and sits there until I reboot. It's getting a little frustrating trying to figure out what I'm missing - can anybody help me out with this, or just point me to a place where I can find some clear, comprehensive instructions? -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]

