Is anyone having difficulties finding out how to transfer Apple Mail to a Gmail account? Then don’t worry, go to Google and search for the eSoftTools MBOX Converter tool, which can easily export mbox emails into PST files without destroying any of the mbox data, as well as more than 25+ email client mbox folders for migration and time savings. It can convert emails to PST, EML, EMLX, YAHOO, MSG, and HTML formats, as well as continuing to work with MS OUTLOOK 2019, 2016, 2013, 2010, 2007, and 2003.
For more info:- Import Apple Mail to Gmail account
You can manually configure your Apple Mail account to Gmail without any hassle. This is an simple way to open MAC mail data in Gmail.
But it takes some time.
Second method is use GAMMO tool to import PST file to Google Workspace. For which you have to export MBOX to PST first.