Additionally, your Apple OS provides three free programs which you may use as an alternative to Office, Pages, Numbers and Keynote. They are the free LibreOffice and OpenOffice apps. If a person elects not to upgrade their Microsoft Office, there are several excellent alternatives.They also will no longer work and will have to be upgraded or replaced. Any other old 32 bit programs you have installed will also be affected.That has finally occurred as we have been told it would. First, Apple has regularly informed all of us for a couple of years that at some point our old 32 bit programs would no longer work with a future OS upgrade.I hope the following is helpful to you in addressing ‘problems’ with Microsoft Office after an OS upgrade.