At this time, the newest SDK version that Audacity can build with is 10.6. To build Audacity using Xcode 5.1 or newer, you need to extract the 10.6 SDK from an earlier version of Xcode. In the instructions below, Xcode 4.3.3 (for the 10.6 SDK) and Xcode 5.1.1 will be used. Xcode 6.1.1, 6.3, 6.4.1, and 7.0 have been verified to work as well. 1) Download Xcode 5.1.1 or greater and install it to /Applications 2) Download Xcode 4.3.3 and open it in Finder 3) Right click the "Xcode.app" bundle and select "Show Package Contents" 4) Navigate down the directories to get to: Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/ 5) Copy the MacOSX10.6.sdk folder to: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/ Xcode is now ready. 6) Download wxWidgets. We currently require version 3.0.2, which can be downloaded from: http://sourceforge.net/projects/wxwindows/files/3.0.2/wxWidgets-3.0.2.tar.bz2 7) Once the download is complete, untar it (your browser may have already done this): tar xf wxWidgets-3.0.2.tar.bz2 8) Apply the following fixes to wxWidgets: cd wxWidgets-3.0.2 patch -p0 -i /mac/wxMac_additions/wxMac-3.0.2-fixes.patch 9) And finally build/install wxWidgets: sudo /mac/build_wxwidgets You should now be able to build Audacity using either the Xcode application or the xcodebuild command line tool. If you need Audacity to use languages other than English, then you'll have to install the gettext suite of tools (to get the msgfmt command). The source can be downloaded from: ftp://ftp.gnu.org/gnu/gettext/gettext-latest.tar.gz Untar it: tar xf gettext-latest.tar.gz And install: cd gexttext-latest ./configure sudo make install