Here's my specs: System: OS Panther 10.3.4 Dual 1 Gig CPU 1.5 Gig RAM L2 cache 256 kb per processor L3 cache 2 mb per processor Bus speed 133 Thanks for all the info so far - it gives me hope that I won't have to replace this computer yet! OY - I just finished paying it off! ;) I have contacted e-on but probably won't get an answer until Monday or Tuesday. I was a little freaked-out by this, so I really appreciate all your help. Baz - About the wipe-clean uninstall - do you mean I should even take Vue4 off the Mac also before trying the Vue5 demo again? -Cathy