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App telling me that a copy of Thunderbird is already open but it's not. iMac El Capitan

Thunderbird Apañuái ñemoĩporã
Zenos ombohovái
Geggsy125
Geggsy125

iMac 27" El Capitan (10.11.6 (15G31)) Thunderbird 52.3.0

I am unable to open Thunderbird as it is telling me that "A copy of Thunderbird is already open. Only one copy of Thunderbird can be open at a time" (see image).

There is no copy open.

When I open the "Force Quit" dialogue box Thunderbird is not showing there as an option. I am unable to open the app and access any email.

I have tried to upload a jpeg of the warning box but the site is not uploading the image for some reason!!!

iMac 27" El Capitan (10.11.6 (15G31)) Thunderbird 52.3.0 I am unable to open Thunderbird as it is telling me that "A copy of Thunderbird is already open. Only one copy of Thunderbird can be open at a time" (see image). There is no copy open. When I open the "Force Quit" dialogue box Thunderbird is not showing there as an option. I am unable to open the app and access any email. I have tried to upload a jpeg of the warning box but the site is not uploading the image for some reason!!!

Opaite Mbohovái (1)

Zenos
Zenos

Maybe you have a lock file that needs to be deleted.

http://kb.mozillazine.org/Profile_in_use