



Apple's Xcode Developer Tools (version 11.0 or later for Catalina, 10.0 or later for Mojave, 9.0 or later for High Sierra, 8.0 or later for Sierra, 7.0 or later for El Capitan, 6.1 or later for Yosemite, 5.0.1 or later for Mavericks, 4.4 or later for Mountain Lion, 4.1 or later for Lion, 3.2 or later for Snow Leopard, or 3.1 or later for Leopard), found at the Apple Developer site, on your Mac operating system installation CDs/DVD, or in the Mac App Store. Using the latest available version that will run on your OS is highly recommended, except for Snow Leopard where the last free version, 3.2.6, is recommended.Apple's Command Line Developer Tools can be installed on recent OS versions by running this command in the Terminal:Older versions are found at the Apple Developer site, or they can be installed from within Xcode back to version 4.
