Thank you, Arthur and Mojca, for your quick and clear response. It is probably not worth bothering for this particular machine. I have access to the minimals on several other Macs (including a much older, not to say ancient PowerMac G4, also on Tiger). So I'm not particularly needy in this respect. I rescued this iBook from a garbage dump, in fact there were two of them, both defect, from which I have been able to make one working machine, and I just thought that it would have been nice to have ConTeXt-minimals on it. But it is puzzling. I never had any problems with two other PPC Macs, so what makes this one essentially different? (No answer needed.) Best regards, Robert Blackstone