hello , i can't update my mac Pro OS

Back up your data, check your applications for compatibility, and depending on which Mac model you have, click on Catalina, Big Sur, or Monterey; a desktop Mac Pro needs to be a 2013 or newer model to run the current version of Microsoft Office. For reference, Macs run macOS, not iOS.

Catalina and newer won't run 32-bit software; download and use Go64 to scan for it. To check other programs, click here and look them up.

(212551)

Hi,

It depends on your MacBook Pro model. If your MacBook Pro is 2012 or later, you can install following macOSs.

How to get old versions of macOS - Apple Support