I can’t seem to update safari browser in my 2015 MacBook Air. Is it to old?

Apple does not usually offer Standalone Update fro Safari.

Safari is part of the version of macOS Installed on the computer.

To update Safari will require upGrading the version of macOS.

The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.

With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install.  For Best results use Safari to commence the download as Others may not work.

Safari will open a redirect and open the Apple Store where the download can commence.

If no ” Get Button “  Replace the https in the page's address to macappstore. Credit to Contributor @Niel

Computer Qualify for the Monterey upgrade

macOS Big Sur 11 hardware requirements

macOS Catalina 10.15 hardware requirements

macOS Mojave 10.14 hardware requirements

macOS High Sierra 10.13 hardware requirements

macOS Sierra 10.12 hardware requirements

Caution - jumping over all the newer versions and directly to Big Sur  / Monterey on Qualifying computers is Technically possible - there are those who have attempted and were successful. Then there are those who attempted and had less than good results.

If this is a Production or Mission Critical Set-up - a more prudent and measure approach is suggested. 

The above is from observations on the Apple Support Community Forums and IMHO

Tips Big Sir Upgrade Released Nov 2020

Tips Monterey Upgrade  Released Oct 25, 2021

Make Time Machine Backup  is very useful and can be used to Revert to Previous Working macOS

Notation - Mojave is the Last version to support 32 bit applications / extensions and Drivers. Catalina, Big Sur & Monterey supports only 64 bit and there is no workaround.

Suggest using Go64 to find 32 bit application before attempting the upGrade. Some or many of the Application already installed may required update or upGrades to 64 Bit Versions.

Good evening,

I see that you're using a MacBook Air 13-inch from 2015. Unfortunately, macOS Monterey isn't compatible with this device; the only supported devices from 2015 are the MacBook Pro 15 and 13-inch models. If you're ready for an upgrade, I recommend the MacBook Air with the Apple M1 chip. Learn more about this device here: MacBook Air - Apple; I've gone ahead and customized a model based on what you're currently using; check it out and make necessary modifications to fit what you need; here's the link for that: https://share-a-cart.com/get/T2PFU.

Have a great weekend, and thanks for reaching out to Apple Support.

Hi Bullrun1862,

What OS are you running? go to the apple top left then about this mac you should see the virsion there.

Hi mateoargano,

What you say is not true.

I have myself a MacBook Air 13 2015 and it works just fine on the latest mac os.

Whoops, I was looking at the wrong compatibility section.

Hi Bullrun1862,

I upgraded through the app store. When it first came out.

This sounds like the site you are trying to get to has a problem, or that it is HTTP and not https