This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Buscar en Ayuda

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.

Learn More

Este tema ha sido archivado. Haz una nueva pregunta si necesitas ayuda.

A copy of Thunderbird is already open MacOS 10.15.1 - happened after upgrade of OS

  • 1 respuesta
  • 1 tiene este problema
  • 1 visita
  • Última respuesta de Wayne Mery

Tom S
Tom S
more options

After upgrading to Mac OS 10.15.1 Thunderbird reported error that I cannot use the profile because it is in use. Default would work. After investigation removed .parentlock from ~/Library/Thunderbird/Profiles/ . Then error message changed to A Copy of Thunderbird is Already Open. Still can open default, but none of our other profiles. Any suggestions?

Is this a stupid question? Not seeing any suggestions. Thanks.

After upgrading to Mac OS 10.15.1 Thunderbird reported error that I cannot use the profile because it is in use. Default would work. After investigation removed .parentlock from ~/Library/Thunderbird/Profiles/ . Then error message changed to A Copy of Thunderbird is Already Open. Still can open default, but none of our other profiles. Any suggestions? Is this a stupid question? Not seeing any suggestions. Thanks.

Modificadas por Tom S el

Todas las respuestas (1)

Wayne Mery
Wayne Mery
  • Moderator
  • Top 10 Contributor
more options

Have you since solved your problem? (so that we know if you still need help)

Or if you did solve it, how did you solve it? (so that others can learn)

And since you are on a Mac, make sure you installed Thunderbird in the the Mac applications, and are not running Thunderbird from the downloaded dmg file.