Dear D,
As Bob said, please first check whether you are using the latest version number of the Mac operating system and the Excel for Mac application. If no, update them first and then restart the Mac to do a test to see the result.
If you do a test with another sheet file, what's the result?
If it is convenient, I'd like you to provide the version number of the Mac operating system and the Excel for Mac application you are using now for our reference.
As the issue may be a printer related issue , you can check whether it is a driver or firmware update issue as Bob suggested as well.
Welcome to share any updates at your convenience.
Thanks for your effort and time!
Sincerely
Cliff | Microsoft Community Moderator