Ah, then perhaps you didn't rip the cd/dvd properly. Best, Cat_7 Ah. What's the best way to do that? I used Disk Utility and made it a CD/DVD Master. I'll try dd next. EDIT: Using dd worked a charm! 10.4 Tiger now installing! Thanks anyway. EDIT 2: 10.4 installed just fine, but now I can't boot it ...

Cat_7 wrote:What is the exact error you get?

Do you have spaces in your path to the iso?
Writing it out in full or putting it between " " might help.

Best,
Cat_7

it's the "No valid state has been set by load or init-program" error.

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