I have a customer who has used Entourage 2008 on High Sierra for his email. Entourage 2008 has since stopped working. So I can't natively export to mbox.
I have since installed office 365 for his use - but it will only import from Outlook 2011.
I tried installing office 2011 for mac to do the import and it will not install.
I have the database file just no way to export from it. Any suggestions?