Safari 4: How to Move the Tabs Back to the Tab Bar
If you don’t like that Safari 4 has the tabs located at the very top of the browser window, you can move them back to the Tab Bar like they were in Safari 3.
1. Open Terminal.
2. Execute the following command:
defaults write com.apple.Safari DebugSafari4TabBarIsOnTop -bool NO
Restart Safari. If you don’t see the Tab Bar, go to the Menu, click on View and select Show Tab Bar.
Your tabs go from this:

to this:

To return the tabs back to their original position, open Terminal and execute the following command:
defaults write com.apple.Safari DebugSafari4TabBarIsOnTop -bool YES




vipersonic said on March 11, 2009
how do we windows users do that?
psd 2 html said on March 15, 2009
i think it’s only for Mac OS.
it’s a pity! :(
Ken Hayward said on May 18, 2009
Tried this on Safari 4 Build 5528.17 and the format it accepted was:
defaults write com.apple.Safari DebugSafari4TabBarIsOnTop NO