Hi
Thank you for your question in this community. I am willing to help you answer your questions, according to your description of the problem:
You have tried to print and the display is normal, and there is no problem opening it in windows and another Mac.
You can try to insert the picture into Word for mac to see if the problem exists. This can help us find out whether the problem is in the Office product or the Mac system.
At the same time, you can also try to insert other pictures to see if the problem exists.
If the problem continues, you try to insert the picture into Notes (non-Office app). (To rule out the possibility of the problem)。
Thank you for your understanding and patience. Finally, please send me the test file private message , and we will do our best to help you solve the problem!
Which version of Excel are you currently using? You can check it through Excel>about Excel in the upper left corner,
You can try to update your Excel to the latest version, and then check whether the problem exists.
And What is the version of your mac?
Best Regards
Ethan