I have a Power mac 867 dual core need help asap please

What do u mean option to zero all data I do not see that option on my mac... My mac is driving me mad cannot for the life of me get it configured I have literally been stump for almost a yr, I go to a friends studio most of the time I am about to go back to my PC, though I use to own a mac before and prefer it, but if I cant use it for what I need what's the point..So let me bring u up to speed....I have PowerMac 867 dual core, and and trying to run pro tools 7.1 M-Audio projectmix i/o... It worked fine on my pc but at times crashed so I thought I needed a stable platform, though stable I have yet to recored a single thing it has almost been a year.... Can anybody help me get it running..help help help!!!!