I've been told by several people (as I fretted about updating my 5005) that "if it ain't broke, don't fix it".
In other words, if you're satisfied with how it's working, why change it and bring into the picture even the slight possibility of something going wrong with the upgrade?
I went ahead eventually, and couldn't be happier.
As for the mac vs. pc end of things, I'm not sure. If a mac CAN'T make a disc that can upgrade your machine, it's always possible some kind soul here could make one up on their pc for you and mail it to you.
[i]Just as a side thought, if typing in all caps is considered "yelling" online, and so discouraged, I wonder if altering the text font to one that's so dark and thick is such a good idea...
Just wondering, of course. [/i]