Starting Thunderbird is extremely slow
Hello, I recently bought a MacBook Air 2024 with G3 chip (Sonoma 14.6.1) and used Time Machine to transfer all the data from my previous Apple MacBook Air from 2015 (Mojave 10.14.6) to the new computer. This also transferred my Thunderbird profile folder. It has the extension .default and an 8-digit combination of letters and numbers in front of it. Since the old version of Thunderbird no longer ran on Sonoma, I installed Thunderbird 115.15.0 and then opened Thunderbird on the new MacBook Air. Since then, Thunderbird has been taking an extremely long time to open (much longer than on the old MacBook Air with Mojave. Yesterday I updated to 128.2.0esr, which didn't help either. I deleted a deactivated extension in the add-ons, so that there are now no extensions, only a few dictionaries that I deleted as a test, which also did not bring any improvement. Switching off the hardware acceleration, clearing the cache and changing the themes did not improve the situation either. With the themes, I can only switch between dark, light and system theme - automatically. I checked and made sure that Thunderbird actually loads the .default profile folder from my old computer as the active profile. However, Thunderbird has also automatically set up a second profile with the extension .default-release. Could this be causing the problem? My active profile folder has a size of 15.21 GB and the new .deault-release profile folder has 18.6 MB. Both profile folders are located in Library/Thunderbird/Profiles I am quite desperate and hope that someone can help me. Thank you very much!
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I don't know why thunderbird is slow for you, but the extra profile is not it. Thunderbird uses only one profile at a time. If the other profile has nothing of value, it can be safely deleted.
Thank you very much David. Starting Thunderbird takes a few minutes which was not the case on my older MacBook Air. I hope that someone can help me solve this problem. At least I know that the problem is not the second profile folder or the different names ending with .default or default-release.
Disable Thunderbird's access to Mac Contacts in Mac System Settings > Privacy & Security > Contacts.
Better?
Wayne Mery said
Disable Thunderbird's access to Mac Contacts in Mac System Settings > Privacy & Security > Contacts. Better?
Hello Wayne, Thank you very much for the feedback. This was helpful. Without loading the Mac address book Thunderbird starts faster. However now without Thunderbird's access to my address book with several thousand addresses I have to start filling the Thunderbird address book by hand or typing each single address in the email header. With older OS X systems this was working properly. Do you think that Apple will get rid of this bug some time? Happy New Year!!
If you have activated iCloud you could create a CardDav address book for your Mac "Contacts".