Safari is included with your Mac operating system.
Updating Safari
Safari Update
To keep Safari up to date for the version of macOS you're using, install the latest macOS updates.
Dec 19, 2016 I resisted upgrading to El Capitan because of the negative comments about it, I just wondered about peoples experience of upgrading from OSX 10.8.5 (Mountain Lion I think) to MacOS Sierra? I feel that I should upgrade because of security issues. My main use is Safari, Mac email, Word, Excel and Preview. Jan 23, 2019 Get the latest 10.8.5 OS X Mountain Lion the newest version of the world’s most advanced desktop operating system. It has over 200 new features that update the Mac and make it the best computer there is. Use the new Messaging app to write and send photos, videos, contacts, links and documents to anyone using another Mac, iPhone, iPad or iPod. Reinstall Safari after applying 10.6.8 v1.1 updaters. If you updated Safari to version 5.1 and then applied the OS X 10.6.8 v1.1 update, you will need to redownload the latest version of Safari again.
The most recent version of macOS includes the most recent version of Safari. For some earlier versions of macOS, Safari might also be available separately from the Updates tab of the App Store.
Safari For Mac Update
Reinstalling Safari
If you deleted Safari and don't have a Time Machine backup or other backup, reinstall macOS to put Safari back in your Applications folder. Reinstalling macOS doesn't remove data from your computer.
Before reinstalling, you might want to use Spotlight to search for Safari on your Mac. If you find it, but it's no longer in your Dock, just drag it to the Dock to add it back.
Safari for Windows
Safari Update For Mac 10.8.55
Apple no longer offers Safari updates for Windows. Safari 5.1.7 for Windows was the last version made for Windows, and it is now outdated.