Problems with Mail after updating Tahoe 26.6.2

After updating Tahoe 26.6.2 I have sincere Problems with Apple Mail. Nothing is working normal. Messages do not synchronize, can not be deleted and so on. Also the same Problem on my iPhone and iPad. All the well known Suggestions (remove account, shift when opening mail, remove Envelope in Library) nothing gives the Solution. Really unbelievable that Apple does nothing on this Problems. For the first time In 25 years happiness with Apple I now consider alternatives for my email App. Any Advice on that is welcome.

Posted on Aug 23, 2026 12:02 AM

Top-ranking reply

PreCognition

Level 5

5,492 points

Posted on Aug 23, 2026 8:59 AM

That rules out the Inbox size. With only 30–40 messages and the IMAP limit already set to 1,000, I wouldn’t keep rebuilding Mail.

The other important clue is that your second Gmail account works, while this particular Gmail account is slow on the Mac, iPhone, and iPad. That points more to an account-specific Gmail/Apple Mail synchronization problem than to a damaged Mail database on the Mac.

One low-risk check I’d make in Gmail webmail is Settings > See all settings > Labels. If that account has Gmail labels you don’t need in Apple Mail, turn off Show in IMAP for those nonessential labels and let Mail resync. Don’t change Inbox, Sent, or Trash. Google specifically recommends reducing the folders exposed to IMAP when a mail client is syncing slowly:

https://support.google.com/mail/answer/7126229

Also, on the Mac open Window > Activity, then try deleting or moving one message from that Gmail Inbox. If an operation sits there for a long time, the exact wording shown in Activity would be useful to know.

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16 replies

rgdebree Author

Level 1

39 points

Aug 23, 2026 10:17 AM in response to PreCognition

Problems with Mail after updating Tahoe 26.6.2