hi pineapple,
I have been on macs for 10 years or so, well my first was a G4 AGP graphics "Sawtooth". The next was a G4 "MDD", which I still have, and now a mac pro. I have Onyx, but very rarely use it. Just let the mac do its own thing and it all seems to be fine. Touch wood I don't seem to get any probs. So all I can recommend is doing nothing !