selenium-MultimediaViewer is failing for macOS Chrome and Safari with:
Misconfigured -- Unsupported OS/browser/version/device combo: OS: 'OS X 10.9', Browser: 'googlechrome', Version: 'latest', Device: 'unspecified' (Selenium::WebDriver::Error::WebDriverError) Misconfigured -- Unsupported OS/browser/version/device combo: OS: 'OS X 10.9', Browser: 'safari', Version: 'latest', Device: 'unspecified' (Selenium::WebDriver::Error::WebDriverError)