Once you select the “Go To Folder” option you will get a pop-up with a box to enter the folder locations. Or you can select the “Go To Folder” option from the “Go” menu. If you hold the ‘alt’ key while in this menu, you will get the option of the ‘Library’ folder. To access the Library folder, you can use the “Go” menu from the Finder. ~/Library/Containers//Data/Library/Mail Downloads The location that Apple Mail saves attachments to is in the Users Library folder.
If you have ever opened an attachment from an e-mail, worked on it and pressed “Save” instead of “Save As” the document is saved to this specific location. Why Would I Need To Know Where Attachments Are Stored?
Every file that is sent to you by e-mail is then stored in a specific folder.