Visit this Apple Support page to learn more about upgrading your Mac. If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version that Apple supports. Visit this Apple Support page to find your Mac OS version. Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher. This is my first venture into Mac, as I have always used windows, but found the virus susceptibility worrisome. I am using Mac OS Sierra 10.12.1 and Safari 10.01.1 I have 8GB of Ram and a 1 TB hdd. It's very frustrating and I would love to know the real cause. I don't seem to get it very often when I use Chrome, but I do upon occasion. Shows 11.4% of site visitors using an Intel Mac are using OS X 10.6 Snow Leopard, and 6.2% are still on 10.7 Lion, while 10.8 Mountain Lion is in its death throes at. Google Apps Manager Google Apps Manager or GAM is a free and open source command line tool for Google G Suite Administra. Google google chrome for mac os 10.5 free download.