Just wanted to pass along this solution I got from Intuit. 

This is the utility option that says "Copy Company File for Quickbooks Mac."

1) verify data -- no problems found

2) rebuild data -- one problem found and corrected

3) try again -- it still failed

4) rebuild again -- no problems found

5) try again -- and it worked.

Hello there, @eichanod.

I appreciate you sharing your inputs here in the Community. This will surely benefit other users that are having the same issues.

Also, if you encounter any data issues with QuickBooks Desktop, you can always check out this article for some troubleshooting steps: Resolve data damage on your company file.

Feel free to reach back out to me if there's anything else you need. I'm always here to help. Wishing you and your business continued success.