How to run selenium tests in headless mode on Mac using Webdriver with firefox 17.0.1

How to run Automated selenium tests in Mac OS 10.8 with firefox 17.0.1 using Xvfb(X-virtual frame buffer) Anyone help me regarding this configuration.

I don't think such old Firefox version is still relevant. But for those who still want to use old Firefox versions - take a look at Selenoid project. This is a lightweight Selenium-compatible server coming with a set of prebuilt Docker images for all Firefox versions starting with 3.6. All images include Xvfb inside, so this solution is completely headless.