Learning a new language with the help of a tutor might cost you a few bucks. A free solution comes from French Class Study Daily, a simple and efficient program that helps you learn and practice your French speech and writing skills from the comfort of your home.
Once you launch the application on your computer for the first time, a window will appear on your desktop where you can configure the app's display settings according to your needs. You can run the utility in fullscreen or windowed mode and choose the preferred graphics quality level. These options can be changed the next time you launch the program.
The application gives you access to 4 topics, each with its own list of subtopics. After you select the material you wish to study, you can check its correspondent lesson and take the quiz. A test contains 10 questions, each with 4 answering options. Once you complete the quiz the program gives you access to detailed statistics based on your test results.
An important advantage is the fact that the utility offers you comprehensive lessons with phrase samples and detailed explanations. So, it's pretty simple to learn the basic concepts of speaking and writing in French.
Furthermore, the application is free of charge. So, I can't find a reason why you shouldn't give this program a try on your Mac.