Can I install the latest macOS on my old Mac?

Some people mix iOS for macOS

iOS is for Apple iPhones / iPads

macOS is for Apple Computers

To answer you question regarding upGrading an older computer

Simply put

The Age of this computer will Govern what newer version of macOS it will Qualify to install. 

Without an Technical Details regarding you computer

It is impossible to Directly Answer this question

Find out which macOS your Mac is using

Does this computer appear as Listed and qualifying for an upGrade to a newer version of macOS ? 

With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install.

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

If Yes, suggest having at least 50 GB of Empty Space on the drive.

It will allow the Full Version ( about 12.xx GB ) to download, then expand and then commence to install.

If there is Third Party Security Software installed - remove it.

It will interfere with both the download and installation process.

The below links will help identify which version of macOS  this computer may Qualifies to run.

macOS Sequoia compatible Computers 

macOS Sonoma is compatible with these computers

Computer Qualifying for macOS 13 Ventura 

Computer Qualify for the Monterey upgrade

macOS Big Sur 11 hardware requirements

macOS Catalina 10.15 hardware requirements

Always make a Time Machine Backup  before doing any upDates / upGrades 

Your tag line indicates that you are currently running macOS 10.12 (Sierra) on a 13" MacBook Air. No MacBook Air that is old enough to run Sierra Is recent enough to run anything later than Monterey, and many MacBook Airs that run Sierra are not recent enough to update that far.

There have been three versions of macOS since Monterey (Ventura, Sonoma, Sequoia). Thus, if the information in your tag line is correct, you cannot have the latest version of macOS, or even one of the "most recent three." (Not on that old computer, anyway.)

Once you determine what versions of macOS your Mac is able to run, see:

How to download and install macOS - Apple Support

Note that Catalina and later break 32-bit applications.

Installing any " HACKED " version of macOS on a NON Qualifying Apple computer would not receive any assistance from any Reputable Contributor - Full Stop