Virtual Combat Cards can run on Mac OS X 10.5. There are some important points to consider:
Besides these points Virtual Combats Cards should work fine. Since there are no native installers the process is slightly different than on Windows and Linux. These instructions should be enough to get you started.
In order to get VCC working on Mac OS, follow these steps:
vcc;
cd ~/Downloads/vcc
sh vcc.sh
This instruction assumes the full version of VCC is in Downloads/vcc. Once you have it running please use Help > Check for update... to update your VCC version.
If we have people or Mac to test this, this should be solved by the next full release. Please place comments on how to improve this installation process.