Email, Messaging, & Video Calls Email How to Export macOS Mail Messages as Mbox Files macOS Mail allows you to export your emails in a more transferrable format by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on March 25, 2020 Seb Oliver / Getty Images Email Yahoo! Mail Gmail Tweet Share Email Your email is safe and searchable in macOS Mail — accessible anywhere on an IMAP server and downloadable as a mbox file. Mbox files keep emails in a simple, transferable format that can be easily imported into other email programs and operating systems. How to Export a macOS Mail Folder to an Mbox File Exporting from macOS Mail is very easy. Follow these simple instructions to save an email folder as a mbox file using macOS Mail: With Mail open, select the mailbox or folder you would like to convert to a mbox file. You can select multiple mailboxes or folders by holding the Command key and then selecting the individual folders you would like to include. To highlight multiple folders in a continuous row, select the first item, then hold the Shift key and select the last item; macOS will highlight all of the items included between the two selected items. From the menu bar, select Mailbox > Export Mailbox... Choose a destination folder for the mbox file, then select Choose. The new mbox file will save to the selected destination. The default destination folder will be the Desktop.