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 October 25, 2020 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 generic mbox file. Mbox files keep emails in a simple, transferable format that can be easily imported into other email programs and operating systems. Seb Oliver/Getty Images How to Export a macOS Mail Folder to an Mbox File Exporting from macOS Mail is easy. Follow these simple instructions to save an email mailbox or folder as a mbox file using macOS Mail: Open the Mail app by selecting its icon in the Mac Dock. Click the mailbox or folder you want to convert to an mbox file in the Mailboxes panel. You can select multiple mailboxes or folders by holding the Command key and then selecting the individual folders you want 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 highlights all the items between the two selected items. From the Mail menu bar, select Mailbox > Export Mailbox. Choose a destination folder for the mbox file and then select Choose to save the new mbox file to the selected destination. The default destination folder is the Desktop.