MacOS Monterey

Manage your disk space:

https://support.apple.com/en-ca/guhttps://support.apple.com/en-ca/HT206996

and

https://support.apple.com/en-ca/HT206996

then you can

https://support.apple.com/en-us/HT212735

or use direct link:

http://swcdn.apple.com/content/downloads/39/60/002-23774-A_KNETE2LDIN/4ll6ahj3st7jhqfzzjt1bjp1nhwl4p4zx7/InstallAssistant.pkg

..also consider the age and linage of your Mac..

Maybe below threshold range to support Monterey.

Details are within this 'support installer download' page

to help determine which of those your Mac could run.

(Compatibility is subject to other configuration specs.)

• How to get old versions of macOS - Apple Support

https://support.apple.com/en-us/HT211683

Always helpful details are important to spell out

when these products may appear to self-identify

with their owner, in the same room.

(Could be new/older stock; from here they look alike.)

Under the Apple icon menu, details may be found

by clicking 'About this Mac'. However, if new 2021

model, then there are only about 4 different ones.

• Identify your MacBook Pro model - Apple Support

https://support.apple.com/en-us/HT201300

[Links to newest macOS versions are in one posted.]

IF you are upgrading from a previous version of Mac OS already installed on your Mac... There is no cost, it is Free...

The last 2 links will help you get Monterey on your system...