Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Søg i Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Læs mere
Åben

Thunderbird has slowed down significantly

Thunderbird Nedbrud og langsom ydelse
Mapenzi replied
zoran9
zoran9

At the start of last week Thunderbird started to be very laggy to the point it is almost unusable.

It was after the update to version 151. Running on MacOS Sequoia

I have tried a number of remedies to try and resolve the issue:

  • Compacting mail folders
  • Repairing mailboxes
  • Clearing the cache
  • Rebuilding the search index
  • Restarting in trouble shooting mode (this caused Thunderbird to hang)
  • I also tried installing the daily build release to see if the issue was resolved

None of the actions above solved the problem. I would very much appreciate any help or experience others have had.

Z.

At the start of last week Thunderbird started to be very laggy to the point it is almost unusable. It was after the update to version 151. Running on MacOS Sequoia I have tried a number of remedies to try and resolve the issue: * Compacting mail folders * Repairing mailboxes * Clearing the cache * Rebuilding the search index * Restarting in trouble shooting mode (this caused Thunderbird to hang) * I also tried installing the daily build release to see if the issue was resolved None of the actions above solved the problem. I would very much appreciate any help or experience others have had. Z.

Alle svar (1)

Mapenzi
Mapenzi
  • Top 25 Contributor

"unusable" means Thunderbird is not responding or eventually "freezes" and you have to force-quit the app? Which is Thunderbird's %CPU usage when you open Activity Monitor before launching Thunderbird? Are all menus unresponsive during this time ? Or are you able go to Help > Troubleshooting information >Profiles > about:profiles...?

Stil et spørgsmål

Du skal logge ind på din konto for at svare på et indlæg. Start et nyt spørgsmål, hvis du ikke har en konto endnu.