Am i able to update my Macbook air (2013)

macOS Big Sur - Technical Specifications

General Requirements

OS X 10.9 or later

4GB of memory

35.5GB available storage on macOS Sierra or later*

Some features require an Apple ID; terms apply.

Some features require a compatible internet service provider; fees may apply.

Mac Hardware Requirements

For details about your Mac model, click the Apple icon at the top left of your screen and choose About This Mac. These Mac models are compatible with macOS Big Sur:

MacBook (2015 or later)

MacBook Air (2013 or later)

MacBook Pro (Late 2013 or later)

Mac mini (2014 or later)

iMac (2014 or later)

iMac Pro (2017 or later)

Mac Pro (2013 or later)

Learn about compatibility and how to identify your specific Mac model

https://apps.apple.com/us/app/macos-big-sur/id1526878132?ls=1&mt=12

And caution on 10.15 or higher, to see which Apps will no longer work in 10.15 get Go64...

https://www.stclairsoft.com/Go64/

What I normally do is go to How to download and install macOS - Apple Support

and find the update.

You can upgrade it to Big Sur.

But also need to see, which MacBook Air 2013, Late or mid or early, this three words are more significant

hemantfrompatna wrote:

But also need to see, which MacBook Air 2013, Late or mid or early, this three words are more significant

There was no Early or Late 2013 MacBook Air.

MacBook Air 2013 is enough,. but yes, other situations it can make all the difference. :)