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I have a smart mailbox with only one rule: messages that are unread.
Right now I have no unread messages in any of my acccounts, yet the smart mailbox shows a counter of 1.
Opening the smart mailbox shows no messages (this is correct). If a new message arrives, the counter goes up to 2, then as soon as I read that message it goes back to 1.
I tried:

  • Rebuilding my inboxes
  • Rebuilding my smart mailbox. Logs this error:

27/10/13 11:42:18,753 Mail[16057]: * Assertion failure in +[MFLibrary mailboxIDForMailbox:loadIfNotPresent:], /SourceCache/Mail/Mail-1816/FrameworkTargets/MailFramework/Library/MFLibrary.m:9814 Called on smart mailbox Unread ( 0 MailCore
0x00007fff8c6ecc8c -[MCAssertionHandler _handleFailureWithPreamble:description:arguments:] + 141 1 MailCore 0x00007fff8c6ecafd -[MCAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 215 2
Mail 0x00007fff8cdf105d +[MFLibrary mailboxIDForMailbox:loadIfNotPresent:] + 170 3 Mail
0x00007fff8ce0ea24 -[MFLibraryStore rebuildTableOfContentsSynchronously] + 533 4 CoreFoundation 0x00007fff921f3dec invoking + 140 5 CoreFoundation
0x00007fff921f3c54 -[NSInvocation invoke] + 308 6 MailCore
0x00007fff8c73db74 -[MCMonitoredInvocation invoke] + 211 7 MailCore 0x00007fff8c760808 -[MCThrowingInvocationOperation main] + 40 8
MailCore 0x00007fff8c704f08 -[MCInvocationOperation main] + 332 9 Foundation 0x00007fff86da9591 -[_NSOperationInternal _start:] + 631 10 Foundation 0x00007fff86da923b __NSOQSchedule_f + 64 11 libdispatch.dylib 0x00007fff8f3212ad _dispatch_client_callout + 8 12 libdispatch.dylib 0x00007fff8f3257ff _dispatch_async_redirect_invoke + 154 13 libdispatch.dylib 0x00007fff8f3212ad _dispatch_client_callout + 8 14 libdispatch.dylib 0x00007fff8f32309e _dispatch_root_queue_drain + 326 15 libdispatch.dylib 0x00007fff8f324193 _dispatch_worker_thread2 + 40 16 libsystem_pthread.dylib 0x00007fff8c3dfef8 _pthread_wqthread + 314 17 libsystem_pthread.dylib 0x00007fff8c3e2fb9 start_wqthread + 13 )

  • Deleting and recreating my smart mailbox
  • Adding a rule restricting the smart mailbox to one account (if the rule is added, it works correctly)
  • Relaunching mail, rebooting
  • Looking in the logs. Only line from mail: 27/10/13 11:38:19,956 Mail[1174]: View Based NSTableView error: preparedCellAtColumn:row: was called. Please log a bug with the backtrace from this log, or stop using the method. 

I'm kinda out of ideas. Is there anything else I can try, any debug info I can access?

  • Please use code formatting for Terminal output! Quote formatting doesn't preserve line breaks and is very difficult to read. – grg Jan 10 '14 at 18:26
8

I fixed this for my smart mailboxes (Mail.app v7.0 1822) by following these steps:

  1. Open a terminal
  2. Re-index Spotlight

    sudo mdutil -E /

I suspect this is related to Mavericks improvements in Spotlight, as it now indexes Mail.app messages much better than in previous releases.

| improve this answer | |
  • marking this as correct, but didn't try. My mail somehow fixed itself, it's possible that Spotlight decided to reindex (it often does) – Agos Nov 19 '13 at 18:14
  • This has worked great both times I ran into this issue. – Martijn Pieters Jan 5 '15 at 17:53
  • Unfortunately these answers age pretty quickly (I'm not sure if this works anymore in Yosemite) – Bruce Alderson Jan 11 '15 at 20:19
  • Searched for a solution to the same problem. On Mac OS Sierra and this solved my issue even now. The most frustrating bug I've come across to date in Mac OS. Cheers for the quick fix. – Conor Higgins Apr 16 '17 at 21:17
1

Vacumming the sqlite index may also be worth a try:

$ sqlite3 ~/Library/Mail/V2/MailData/Envelope\ Index vacuum;
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