I installed Icy on my mac but it doesn’t work. How to fix it ?

First, you need to have java installed on your system (refer to the first FAQ entry to get the instructions), then be sure that Icy is installed in the Applications folder.
The first time you try to launch the application it may not work because of the default Security preferences.
You can force its execution by doing right click on the application icon (or Ctrl+click) and use the Open command, then confirm / validate the operation. You should now be able to use Icy normally 🙂