Can I update Safari on my Mac 10.11?

The current version of Safari for El Capitan is 11.1.2. If you need a browser newer than that, upgrade the OS if possible, or switch to one such as Firefox.

If your version of Safari is older than 11.1.2, open the Mac App Store and install any Safari or security updates.

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Try it and see. The answer varies depending on how people browse the web; except for specific websites, nobody on these boards can tell for you.

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