http://chainsaw.musho.org/stuff/ems-on-mac/
Here ya go, a simple free way to use your EMS 64M Smart Card on your Mac or Linux machine without setting up a virtual machine!.
This method has existed for quite some time, but nobody knows how to compile source, apparently. So I've taken the liberty of writing up a quick tutorial explaining how to set-up and flash your EMS cart on your Mac machine. It's aplha-grade software, but it's basically foolproof.
Enjoy!