Question about Apple Power Mac G4 Desktop

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OS 9.2.2 - System is "locked" & I don't know where to start!

I bought a used Power Mac G4 that came from a school somewhere, and I can't seem to do anything on it. When I try to adjust settings in Control Panel, for most items I get the error message "The application program XXX could not be opened, because it is locked" (with XXX being whatever control panel I'm trying to open, like Appearance, Date and Time, etc.) The system is running OS 9.2.2, with 128 MB RAM; I don't remember what processor speed for sure, but I'm thinking 450 MHZ. I'd like to know if there's some way to fix this & work with what I have (as I have no software disks, of course), or if I need to wipe & install new; if I do need to wipe & install new, what OS should I work with?

Sorry for sounding like a moron - I'm PC-literate & Mac challenged!

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  • glbrozak Aug 26, 2008

    OK, so I looked a little further and figured out the problem is that FoolProof Control is installed on the system. Any helpful advice for how a Mac-idiot can disable this would be greatly appreciated.


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Try to remove all traces of the fool proof thing. There is probably a system extension, a control panel, and pref file to throw away but BE CAREFUL, the system could have been set up prior so that Fool Proof has to be disabled through it's control system before you uninstall. I have seen people try to remove the before mentioned elements and it only exacerbates the problem.
Your best be it to track down those system disks and reinstall the OS. You could upgrade the system to 1GHZ system and run at least OSX Tiger on it. Checkout Otherworld Computing for parts (

Posted on Sep 01, 2008

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