I have several "ON MY MAC" folders in Mail. I know that inbox folders are stored in ~/Library/Mail but where are the "ON MY MAC" folders stored?
Try looking in the user library/mail for a folder "AosIMAP-...."
The On My Mac mailboxes are stored at "~/Library/Mail/V2/Mailboxes/". The Library folder is hidden since OS X Lion, so use the Finder's "Go To Folder" menu in the "Go" menu and enter that address.
I believe that is for an iCloud account. The original poster is asking about the mailboxes a user can create on the Mac to store and archive messages. The "On My Mac" mailboxes are at "~/Library/Mail/V2/Mailboxes/" on OS X Mountain Lion.
I see just the core boxes in V2/Mailboxes for each Mail account: Delete, Drafts, Junk, Notes, Outbox, Sent. But none of my local boxes show up.
What do you get when you open Terminal (/Applications/Utilities/Terminal.app) and execute the command "ls -al ~/Library/Mail/V2/Mailboxes"? It could be possible that the folders are hidden (I remember once back on OS X Lion that I found several folders in the Mail folder hidden).
Same folders as before.
I'll give Apple support a call and post back the findings.
On both of my machines running OS X Mountain Lion, any user created local mailboxes are stored at that address, mixed in with the other mailboxes for all the accounts. Beyond asking are you sure these mailboxes you seek are in face "On My Mac" and saying to look in each folder (hidden and not hidden, but don't touch/delete/move anything) in ~/Library/Mail/, I don't know what else to say as that is where I observe all 'On My Mac' mailboxes to exist. If they exist, they will be in that folder somewhere.
Ah - I see them now and inside Finder. They are in the V2. My local folder structure looks like this:
Folder1
Folder2
Folder3
--SubFolder1
--SubFolder2
----SubFolder1
----SubFolder2
--SubFolder3
--SubFolder4
and even more nested than that. In V2/Mailboxes/Mail Archive.mbox, I did see the three root folders earlier when you first posted that path. I thought maybe Mail stopped archiving the folders and they were moved, since none of the sub folders were there. Then I clicked Folder3 and all of the sub folders are there. I wasn't expecting them to be nested in the file system.
What a kludge.
Where does Mail store folders on my mac?
