To get started with WebDriver in Python on OSx, you need to install Python and its package manager pip, as well as the Selenium library. The recommended editor for this task is any plain text editor such as Vim, Emacs, or Sublime, although several other options are available. You also need to download and add the ChromeDriver executable to your system's PATH environment variable. Once you have these components in place, you can write a simple test using the unittest framework, which includes setting up and tearing down a browser instance, navigating to a webpage, clicking on links, and verifying that elements are displayed. The test is then run by typing `python3` followed by the name of the test file, and it will launch the browser, execute the test, and close the browser instance.