Try holding down the <alt> (also called <option>) key while booting. That may give you a screen with various options for booting. One of them may be useful.
I don’t have a Mac Porwebook to try it on, but it works on my G4 desktop machine. If you can get it to boot from a CD/DVD/USB-stick into the Debian installer, you can then use “rescue” mode to reset the root password. Hope that helps. Rick PS: I realize this is pretty brief — more of a hint than a recipe, and you may need help with some of the details. Feel free to ask on this list if you do. > On Feb 13, 2016, at 12:02 PM, Klaus Becker <[email protected]> wrote: > > Hi, > > someone offered me a Mac G4 with Debian 7 installed. It works, but I have no > password, neither user nor root. > > The bootloader is yaboot. > > There is no CDROM on the machine. > > I tried several methods to boot on Knoppix from usbstick or CD from USB-CD, > but the laptop seems not to be able to boot from USB. > > So what can I do ? > > I use Debian since a long time, but it's the first tile I use it on Mac. > > cheers > > Klaus > >
