How to Fix Mail Not Showing Attachments in Mac OS Sierra
Some Mac users have discovered that Mail app has stopped showing attachments after updating to Mac OS Sierra, despite not having manually removed the attachments themselves. Additionally, existing emails with attachments may appear as if the email attachments disappeared entirely.
While having disappearing Mail attachments can be alarming, you can usually resolve this issue with a two-step process.
While this is aimed at resolving disappeared attachments on MacOS Sierra Mail app, it will likely work with other versions of Mac OS that have disappearing or vanished email attachments as well.
How to Fix Disappearing Mail Attachments on Mac OS
This two step process should work to reveal any missing email attachments in Mac Mail app again. If you are not sure of what you are doing, you should backup your Mac before beginning this process. Rebuilding an email inbox should not be problematic, but it’s better to be safe with a fresh backup anyway.
- Open the Mail app on Mac OS if you haven’t done so already
- Pull down the “Mailbox” menu and choose “Rebuild” from the option on the bottom, let the email mailbox(es) rebuild, this can take a while
- Next, go to the “Mail” menu and choose “Preferences
- Select “Accounts” and then click on the email account where mail attachments seemingly disappeared from
- Under the ‘Account Information’ tab pulldown the menu next to “Download Attachments” and choose “ALL”
- Close out of Preferences and open an email with an attachment, it should be visible again
Attachments should be visible as usual again, unless you either have them disabled or they are an incompatible file format. Typically if you are getting incompatible attachments, they are from a windows sender and this tip for opening Winmail.dat files on a Mac can be helpful. It’s also worth noting that very large attachments in Mail are sent through Mail Drop nowadays often, assuming they are sent from another Apple user with iCloud, and thus the attachment will be a download link instead of a true attachment.
Separately, you should also update to the latest version of Mac OS Sierra that is available, as of writing that is 10.12.2. Backup the Mac and then go to the App Store Updates section to find whatever MacOS update is available for the computer. If you are specifically avoiding MacOS Sierra due to problems or for some other reason, obviously you wouldn’t want to install anything beyond incremental software updates or security fixes for your specific version of Mac OS or Mac OS X instead.
Did this work to reveal missing email attachments on your Mac? Do you have another trick or troubleshooting step that resolved the issue for you? Let us know in the comments.