iMac (27-inch, Late 2013) problems printing PDF

I have a iMac (27-inch, Late 2013) with macOS Catalina 10.15.7. The computer runs fine. No issues. I use it to do basic stuff, internet, email, printing. I do have a problem printing from Adobe at times. Many documents no issues at all, but some will have a black box around the image or sometimes the entire page prints black. I read that I may need to update Adobe reader but when I try it says I need masOS 12. or higher. I am unable to update the OS. Is there anything I can do about adobe reader or another way to print PDFs?

Thank you!