Did you know that you can run ToyBase and other Microsoft Windows software directly on your Mac?  Apple provide a product called Bootcamp and describe the process in these articles.  I use a product called VMWare Fusion which does the same job and allows you to run Windows applications side-by-side with Macintosh applications. Beware that Fusion charges you £50 nearly every time Apple release a free Mac update. You will need a Microsoft Windows installation CD and a Microsoft Windows licence in order to install Windows on either of those products.  See their website for details on how to get everything installed. Here is a picture of ToyBase running on a Mac (click to zoom):