Your signatur line indicates you run macOS 10.13 High Sierra. If that's correct, be aware that any 32-bit apps that you are currently using will be incompatible with macOS 10.15 Catalina, macOS 11 Big Sur and macOS 12 Monterey and will not run. You must update to 64-bit versions or replace them with alternative applications that meet the 64-bit requirement.
This includes older versions of Adobe CC, Microsoft Office apps, some device drivers and apps for printers and scanners and many others. All current Apple software is 64-bit compatible, and updates for some older Apple titles are available for download in the Mac App Store.
This seemingly small detail has tripped up many users who have upgraded to a newer macOS and then find their software is broken.
You can check which of your current apps are 32-bit by clicking the Apple () menu > System Preferences > About This Mac > System Report. Then scroll down the list on the left to <Software> and click <Applications> (you may have to click the triangle next to Software). It may take a moment, but your Mac will list of the apps installed on your computer. Now click the column labeled 64-bit (Intel) and sort them by Yes/No.
Any apps that are listed as No in the 64-bit column will not work under Catalina and newer macOS.
Optionally, to check for 32-bit apps, you can use this free compatibility scanner app https://www.stclairsoft.com/Go64/.
Update/upgrade the apps you use, including device drivers. You'll need to visit the publisher websites for info about what they offer and the path you'll need to take. Consider alternative software, for example Libre Office instead of the MS product, though current MS apps are 64-bit compliant. For devices, likewise a visit to the manufacturer site for driver updates, if any.