You will need to buy a Mac version of Endnote (currently they are on X3 or “13”) and then it should convert the libraries correctly. If not, I recommend you contact Tech support and I am sure they will help convert the libraries you have. I would also recommend running thru the tutorials available, to get up to speed with the significant changes in the software that have taken place since version 4.
thanks for the advice. The link you listed leads me to the previous (X3) version. I assume it’s just an old link, and I just use the new link to upgrade (http://www.endnote.com/enbuy.asp)) through their website?