I know this isn't an easy process for you, chrystij.

I appreciate you for performing some troubleshooting steps to fix the issue of being unable to view and print paychecks or tax forms in QuickBooks Desktop for Mac. The error that you've encountered means that you'll need an  Acrobat reader installed on your Mac computer. Thus, I recommend contacting Apple support to be guided with the process.

As for the steps shared by my colleagues, thank you for letting us know that those are for Windows. I'll have them check their answers.

For more information about printing forms in QuickBooks, I encourage you to check out page 229 of this guide: User Guide for QuickBooks for Mac.

Additionally, I've included an article that'll help you make sure your W-2  form aligns correctly with the boxes on a preprinted form. This is to ensure that all the details are in place while printing the form: W-2 Print Test.

Please let us in the comment section below if you have other printing concerns in QuickBooks. This way, we'll be able to assist you.