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If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version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 X New Version
![Os X New Version Os X New Version](https://support.apple.com/library/content/dam/edam/applecare/images/en_US/macos/Mojave/macos-mojave-about-this-mac-overview-version-build.jpg)
![Download Download](https://i.stack.imgur.com/0Bs9j.png)
![Version Version](https://cdn.vox-cdn.com/thumbor/XH-tNW_sWkWEOziYw73JVXczsJU=/0x0:2574x1440/1200x0/filters:focal(0x0:2574x1440):no_upscale()/cdn.vox-cdn.com/uploads/chorus_asset/file/20047838/Screen_Shot_2020_06_22_at_6.29.44_PM.png)
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.
Os X Version 10.12
An operating system manages all of the hardware and software on a computer. Without it, the computer would be useless. To learn more about how operating systems work, check out Understanding Operating Systems in our Computer Basics tutorial. New features in OS X Yosemite. Each new version of OS X usually includes a lot of new features, and OS X Yosemite is no exception. Jul 31, 2020.
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