ARYSON GMAIL EMAIL BACKUP FOR MAC is a secure and professional application that allows users to download or backup Gmail mailboxes on Mac OS X, including email, contacts, calendar, deleted mailboxes, tasks, notes, and spam folders, and then export them to PST, EMLX, MSG, MBOX, MHT, EML, and PDF file formats. Users may export emails from their Gmail accounts directly into Outlook (Hotmail), Yahoo, Thunderbird, Office 365, Live Exchange, OperaMail, and other Gmail accounts using the mac application. Users may also try out the demo version to see how the software works.

As an Email Migration, I want to recommend one of the most trusted Gmail Backup Tool for Mac. The software name MacSonik Gmail Backup Tool takes backup of Gmail emails with all its mail attachments. It saves Gmail mailboxes, contacts, calendars, attachments in one attempt. Also, it exports Gmail data & saves them into various file formats such as PDF, EML, HTML, OST, MBOX, TXT, DOC, etc. You can access this tool from here: https://www.macsonik.com/gmail/backup/