Hi Light.em,
If you go to System Preferences > Printers & Scanners does your printer show up there?
When you say the "Wi Fi on the printer is not responding" that suggests that the printer has a problem with its connection to your router, access point, etc. That issue would not be caused by an OS upgrade on your Mac.
Presuming your description of the printer Wi-Fi connection being the case, forget your Mac for a moment and focus on reestablishing your printers Wi-Fi connection. Depending on the printers features, that can sometimes be done with WPS. If not, then manually through the menus.
Once you know that the printers Wi-Fi is working, return to your Mac to be sure that your printer then shows up in the Printers & Scanners.