25 October 2013 - Intel released Intel(R) Composer XE 2013 SP1 for OS* X, Update 1 today, 25 October 2013. This compiler and all subsequent compilers will support Xcode 5 / Maverick.
If you have an older vesion compiler and need Mavericks support or Xcode 5 support you will need to upgrade to the Composer X 2013 SP1 Update 1 compiler or newer.
CONFUSED about names and versions? Go here: http://software.intel.com/en-us/articles/intel-compiler-and-composer-upd...
Apple released Xcode 5.0 for OS* X 10.8 Mountain Lion 18 September 2013.
The Intel Compilers for OS* X currently do no support integration into Xcode 5.0. We will support Xcode 5.0 in a future update release. We recommend that customers NOT install Xcode 5.0 on their systems until we have support in the Intel Compilers. At this time we do not have a date for the release of the Intel Compilers for OS* X.