FolioCalc

FolioCalc is an investment portfolio tracker and financial calculator exclusively for Mac OS X.
If you do any stock investing (real or virtual), then you should give FolioCalc a try.

It's a great way to stay continually updated on your portfolio positions (not just share prices) and your investment health as a whole. If you do your own investment taxes and you normally have to manually calculate cost basis, capital gains, etc. for multiple tax lots, it may even become an indispensable tool! It can even help with tracking other investment types such as interest bearing accounts! Visit the products page of the RhodoSoft website for more information and screenshots.