If you’re a Thunderbird user who likes the extensibility but doesn’t like the application’s looks then this is your tip. Here’s a skin that masks the ugliness of Thunderbird to a near match of Mail.app, albeit a little bit of a difficult installation:
- Leopard_Mail_byREO-2007.jar
- AccountBar.jar
- compact_menu_2-2.0.3-fx+tb_Clear.xpi (~mod by me) by compact_menu_2-2.0.3-fx+tb
- Leopard_note.xpi (~mod by me) by XNote
- userChrome.css
- “ToDo” of the tool bar button is “Mark”.
- AccountBar(One in three things does not function.)
Contents of Leopard Mail_package.zip
Extension
image of “AccountBar” installs it in skin.
“compact menu” is usually transparent, but reacts to mouse over.
“Leopard_note” [link]
Extension Installation
Fake Button
Installation
- Open up the Contents of the Thunder.app (Right Click on it –> Show Package Contents)
- Go to Contents –> MacOS –> chrome
- Open up your locale version.jar (most likely en-US.jar)
- Go to your \locale\(local version)\messenger directory (e.g. en-US.jar\\locale\en-US\messenger\
- Locate messenger.dtd and extract that to a temp place, like your desktop, and open it up in TextEdit.
- Search for and and change the appropriate fields. (e.g. “Write” to “New Massge”, “Mark” to “To Do”, “Date” to “Date Received”, “Sender” to “From”
- Finally replace it in the original .jar file.
Here’s a comparison between Mail.app and Thunderbird.

[Image from devianART]
[Via: deviantART from: Hawkwings]
