Note, that to install the Lion or Mountain Lion, your Mac needs to be running Snow Leopard so you can install the newer OS on top of it. How to get macOS El Capitan download. If you are wondering if you can run El Capitan on an older Mac, rejoice as it’s possible too. But before your Mac can run El Capitan it has to be updated to OS X 10.6.8. Mac Os X Mountain Lion Upgrade To El Capitan Os If you're using macOS Mojave or later, get macOS Big Sur via Software Update: choose Apple menu System Preferences, then click Software Update. Or use this link to open the macOS Big Sur page on the App Store: get macOS Big Sur. Mac Os Lion Upgrade To El Capitan Description To get the latest features and maintain the security, stability, compatibility and performance of your Mac, it's important to keep your software up to date.
Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher. Visit this Apple Support page to find your Mac OS version.
If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version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 learn more about upgrading your Mac.
Mac Os Mountain Lion Vs El Capitan
While insecure versions of Firefox will continue to work on OS X 10.8 and earlier, using an up-to-date version of Firefox on a supported version of Mac OS will provide you with the best and safest user experience.