Thank you for your post.
From your description, it sounds like you may have a scaling problem. This is a known issue with macOS and MAPublisher since Geographic Imager doesn’t have a toolbar. We are currently working on fixing this issue, but there is a fix for this in the interim.
Can you please answer the following:
1. Do you have 2 or more monitors connected to your computer?
2. If you go to Displays on your computer, can you confirm that the resolution is set to default? If you have more than one monitor, please check all displays to ensure they are set to default.
3. In Illustrator, can you go to Preferences > User Interface > UI Scaling and ensure that it is set small?
You may need to restart your computer after changing those settings for them to take effect.
Let me know if that works or if you are still experiencing issues. Additionally, if you want, you can email in those answers to us at firstname.lastname@example.org and I can provide some assistance from there.