I have a Mac Mini 1.5ghz with 512mb of ram. I've downloaded a couple different versions of the unsupported G4 9.2.2 iso and have burned them to disc. I used a Mac Pro running 10.14 to burn the image via Finder's burn image option when right clicking the image.
Upon booting the Mini with the disc in the drive, holding down C just results to it booting to a gray screen, nothing on it at all, and its internal fan slowly ramping up to max speed.
The CD as far as I can tell is fine. Putting it in another computer, or the Mini itself while booting into OS X shows all its contents just fine.
Is there a step I am missing to complete the process of getting the image onto a CD?