I have been told the version 3.2.2 of OpenCPN does not work.
However there was recently someone who have successfully installed version 3.3.1824 on a MacBook with Snow Leopard
But you have only Leopard
. Which MacBook do you have?
MacBook2,1 introduced in November 2006, model number A1181, can be updated to Snow Leopard (10.7.5), the MacBook1,1 before however not.
I suggest to try first OpenCPN version 3.3.1824. You can download here:
If this version doesn't work either you will need to update your OS first to Snow Leopard. Give me a note then.