According to the Gmail web interface, I have 319 messages in my inbox, 51 of them unread.
According to Apple Mail earlier this afternoon, back when I was running Mountain Lion, the same was true.
I upgraded to Mavericks. Now I have 8 messages in my inbox. As far as I can tell, the missing messages do appear in the new "Archive" folder, but mixed in with all the other messages I've archived over the years.
Does anyone know what causes this and what can be done about it (besides restoring to my backup of Mountain Lion?
Best Answer
I can confirm what Bob posted: open your GoogleMail or GoogleApps e-mail inbox directly in a browser and mark them all as "unread". Then sync your e-mails in Apple Mail by clicking "Send & Receive All" (or whatever it's called in the English Apple Mail user interface). Then, in your GoogleMail, mark them all as "read" and sync again.
That's it, the e-mails will show up correctly.