A family of Microsoft word processing software products for creating web, email, and print documents.
Hi L Cohen77777
Making many assumption about what you exactly customized... if you added your own personal custom tab using the limited features of Word > Preferences > Ribbon & Toolbar on Word 2016 for the Mac, those customizations are not stored in your Normal template and they are not exportable in any user friendly way as they are in the Windows version of Word.
You can however copy the Word.OfficeUI file, which should contain your customizations, from the following location and paste it into the same location on your MacBook.
/Users/<Your Login Name>/Library/Containers/com.microsoft.Word/Data/Library/Preferences
Before you do this however, you had better make sure there already isn't a file named Word.OfficeUI in that location on your MacBook. Merging two files of this type is not something I am willing to try and take you through, so if you do already have customizations made on your MacBook, I would advise you to add any new customizations manually, just as you created them on your desktop system.
I hope this helps