Try the MacSonik Mac G Suite to Office 365 Migration Tool that can help you in the bulk migration of G Suite data to Office 365 email client. Using this software you can migrate emails, calendars, drives, contacts, and more G Suite items to O365.  It gives you the ultimate feature of Migration Without Attachments. This feature helps you to migrate G Suite data without the attachments which avoids unnecessary attachments from occupying Office 365 storage. This tool maintains the hierarchy of the folder and keeps file data secure throughout the migration process.  Furthermore, this application also provides a free trial version of this utility to learn more.