Email, Messaging, & Video Calls Email How to Export Mac OS X Mail Messages to Mbox Files Share Pin Email Print Seb Oliver/Getty Images Email Yahoo! Mail Gmail 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 July 21, 2019 Your email is safe and searchable in Mac OS X Mail; it's accessible and anywhere on an IMAP server, and it can be basic and portable in a mbox file. Mbox files keep emails in a basic and very robust format that is easily imported into many other email programs and services. Exporting from Mac OS X Mail is a not always straightforward manner, but easy nonetheless. Export a Mac OS X Mail Folder to a Mbox File To save a folder as a mbox file from Mac OS X Mail: Open the folder in Mac OS X Mail.Make sure the folder contains all and only messages you want to export to the mbox file.Select Mailbox | Archive Mailbox… from the menu.Go to your Desktop under Choose a destination for mailbox archives….Click Choose.Open the Terminal application.Type "cd " (do not include the quotation marks but make sure there's a whitespace character following "cd").Drag and drop the ".mbox" file from your Desktop to the Terminal window.Hit Enter in the Terminal window.Type 'cp mbox "../.mbx"'.Do include the inner (double) but not the outer (single) quotation marks.Replace '' with the exported Mac OS X Mail folder's name. If you have exported a folder named "Project Vayu", for instance, the line should readcp mbox "../Project Vayu.mbx"(You can use Tab to have Terminal complete the folder name.)Press Enter. On your Desktop, you now have a .mbx file of your folder in mbox format. You can delete the .mbox file archived from Mac OS X Mail if you like. Export Select Mac OS X Mail Messages to an Mbox File You can also export just some emails to a mbox file from Mac OS X Mail: Highlight the messages you want to export in Mac OS X Mail.Select File | Save As… from the menu.Pick the desired folder and file name under Save As: and Where:.Make sure Raw Message Source is selected under Format:.Click Save.Optionally, click the saved file and add ".mbx" to its name to make the format known.