300000ms), and re-opening them is very expensive if you have large folders full of crapimportant messages. Mine dropped from 60-100% down to <1%.Īccording to that bug report, Thunderbird closes its database after five minutes of inactivity (i.e. That’s it! You don’t have to restart Thunderbird to activate the change, and you should see an immediate improvement in its CPU usage. Check the number of zeros you have if you only have 300000, that could be causing your CPU problems. According to that bug report, the correct value is 30000000. Type idle into the search box, and look for mail.db.idle_limit. You’ll then be presented with the configuration editor. There will be a dire warning, which you can safely ignore. Click the Advanced tab at the top, then choose Config Editor.
#Cannot start thunderbird mac os x how to#
Perhaps they’ll fix this by default eventually, but for now here’s a quick step-by-step on how to fix the problem yourself.įrom the Edit menu, select Preferences (for later versions, select Options from the Tools menu). It makes Thunderbird 17.0.2 much more gentle on the CPU, and according to the report, should work from version 15 onwards. Finally I found this bug report which has a working solution. A bit of poking reveals that it’s a real CPU hog if you have large mail folders (and I never delete anything!). It’s always served me well, but recently I’ve noticed that my laptop’s battery life is abysmal when it’s running. User/YourUserName/Library/Thunderbird/Profiles/fault/chrome/userChrome.My mail client of choice is Thunderbird. You find it in: User/YourUserName/Library/Thunderbird/Profiles/faultĪnd according to that the correct place for your userChrome.css is P.S.: The profile folder is still used in Thunderbird (I'm on Thunderbird 78.9.1). Now you should see the effect of the settings you made in the userChrome.css Then close the settings and restart Thunderbird.
This setting is immediately saved, you don't have to save it manually. You should now see the setting and at the end of the line you should see " false"ĭouble-click on the line and now you should have true. Then type into the search-field: " toolkit.legacy" You do that in the thunderbird-settings: Enter Settings > scroll down to the end, there click on " edit configuration" > click ok to the advice. With that setting you give the permission to Thunderbird to let user configuration of the css happen. Your changes in the userChrome.css won't show any effect until you have toggled to true. Your Thunderbird folder has to be there - it's where Thunderbird puts it by default. Please tell me that you already know that your User home folder Library folder is hidden, by default, and you know how to make it visible. Good luck in hunting down the folder (which already exists if you have been using Thunderbird. It would likely be different on each Mac that has Thunderbird.) (that folder, on MY Mac is named 2s5vqihf.slt - so, it's a random. sit - that's an el, not an eye - and it is a folder name. I am guessing you must be running on Catalina? Folder could be in a different location, I don't yet use Catalina, and haven't spent much time looking around for app-created folders and files, so some may be stuck in unusual spots, I suppose.įinally, the XXXXXX.slt - the extension is.
I told you where to look (in your home folder/Library/ folder. That folder must be somewhere on your boot drive, as Thunderbird creates it when launched the first time. I am not sure if Thunderbird will use some random name that you make up, and I'm not sure if you can force Thunderbird to do that. You still have to find where Thunderbird makes that folder (not just make it yourself) That xxxx(whatever) is a random name for the folder that Thunderbird creates for the user profile.
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