Dear Mojca and Sietse, Thank for your concern. I have tried to update ConTeXt installed in a MacBook which was upgraded to Mountain Lion a week ago too. First-setup.sh runs very well without any errors. Tomorrow, I will run your first-setup.sh in a iMac which had a problem to update. I'll report the result tomorrow. There may be different setting in a terminal as Mojca said. Best regards, Dalyoung