Apple Hardware Test for Mac Pro 1,1
Thanks for your responses. The problem that I am having is browser and finder freezes which forces me to force quit the computer by pressing the power button. I have done several clean installs of the OS, used Disk Utility and Disk Warrior numerous times. The computer will work normally for days and then the problem starts up again and I have to force shut down over and over again. Then it stabilizes for awhile only to start the freezing process all over again. It is not a disk problem because two different disks with the OS on them have the same problem. I am running 10.6.8 because I have software that will not run on later OS. I don't think that it is a RAM problem because I have removed RAM modules (two at a time; there are six), restarting with various combinations of the modules and the problem persists. It is as if the machine has some underlying weakness in some hardware component that is on the edge of failure but still works sometime, most of the time or hardly at all. I have never had this problem with many Macs I have owned through the years. I still have a PowerMac that works just fine but is too slow for what I need to do, process scanned photographs, not to mention that browsers no longer work with Panther. This is why I wanted to run AHT, as a last resort to abandoning this machine which is a big upgrade to the PowerMac.