Steps to Backup Email Mailboxes on Mac
You can easily Save Email files using MacUncle Email Backup Tool. The tool supports Mac OS Machines.
Start MacUncle Email Backup, Select the required Email Application
After clicking the desired Email application, enter the Account credentials to the software Panel.
Select the email folder to convert and choose the respective format from PST, EML, MBOX, HTML, MHT, CSV, OLM, Thunderbird, IMAP, etc.
Advanced Filter option to backup emails of specific date & Export selective folders.
Click on the browse button in order to store the resultant file in the required location else save the file in default location - Desktop.