I have a Mac Mini 2006 and I accidentally set one of the permissions to No Access and so now the OS X will not boot up. ⌘ Cmd+R and ⌘ Cmd+S will not work. All I can do is hold the Opt and choose what to boot to.
I also do not have a Recovery partition. I made a Snow Leopard USB and when I try to repair permissions and verify permissions it straight up fails, but if I repair the HD that works.
How can I repair my computer?