Install Missing Command-Line Tools in 4.3

The Xcode command-line tools are no longer installed by default as of Xcode 4.3. Instead, you’ll need to install them in Xcode’s Downloads preference pane. Choose Xcode > Preferences from the main menu and select the Downloads tab. Under the Components sub-tab, click the Install button next to the “Command Line Tools” entry in the table. They’re roughly 170 MB in size so sit tight while they download and install.

Thanks to Zach Holman ( @holman ) for the following tip: If you want to install the command-line tools without installing Xcode, you can simply download only the tools themselves.