diff --git a/CMakeExternals/ExternalProjectList.cmake b/CMakeExternals/ExternalProjectList.cmake
index 7eeb49a07a..67c827c45b 100644
--- a/CMakeExternals/ExternalProjectList.cmake
+++ b/CMakeExternals/ExternalProjectList.cmake
@@ -1,31 +1,31 @@
 mitkFunctionAddExternalProject(NAME Poco ON COMPONENTS Foundation Net Util XML Zip)
 mitkFunctionAddExternalProject(NAME DCMTK ON DOC "EXPERIMENTAL, superbuild only: Use DCMTK in MITK")
 mitkFunctionAddExternalProject(NAME OpenIGTLink OFF)
 mitkFunctionAddExternalProject(NAME tinyxml2 ON ADVANCED)
 mitkFunctionAddExternalProject(NAME GDCM ON ADVANCED)
 mitkFunctionAddExternalProject(NAME Eigen ON ADVANCED DOC "Use the Eigen library")
 mitkFunctionAddExternalProject(NAME ANN ON ADVANCED DOC "Use Approximate Nearest Neighbor Library")
 mitkFunctionAddExternalProject(NAME CppUnit ON ADVANCED DOC "Use CppUnit for unit tests")
 mitkFunctionAddExternalProject(NAME HDF5 ON ADVANCED)
 mitkFunctionAddExternalProject(NAME OpenCV OFF)
 mitkFunctionAddExternalProject(NAME Vigra OFF DEPENDS HDF5)
 mitkFunctionAddExternalProject(NAME ITK ON NO_CACHE DEPENDS HDF5)
 mitkFunctionAddExternalProject(NAME VTK ON NO_CACHE)
 mitkFunctionAddExternalProject(NAME Boost ON NO_CACHE)
 mitkFunctionAddExternalProject(NAME ZLIB OFF ADVANCED)
 mitkFunctionAddExternalProject(NAME cpprestsdk OFF DEPENDS Boost ZLIB ADVANCED)
 mitkFunctionAddExternalProject(NAME OpenMesh OFF)
 mitkFunctionAddExternalProject(NAME CTK ON DEPENDS Qt5 DCMTK DOC "Use CTK in MITK")
 mitkFunctionAddExternalProject(NAME DCMQI ON DEPENDS DCMTK ITK DOC "Use dcmqi in MITK")
 mitkFunctionAddExternalProject(NAME MatchPoint OFF ADVANCED DEPENDS ITK DOC "Use the MatchPoint translation image registration library")
 
 if(MITK_USE_Qt5)
  mitkFunctionAddExternalProject(NAME Qwt ON ADVANCED DEPENDS Qt5)
 endif()
 
-if(UNIX)
+if(UNIX AND NOT APPLE)
   mitkFunctionAddExternalProject(NAME PCRE OFF ADVANCED NO_PACKAGE)
   mitkFunctionAddExternalProject(NAME SWIG OFF ADVANCED NO_PACKAGE DEPENDS PCRE)
-else()
+elseif(WIN32)
   mitkFunctionAddExternalProject(NAME SWIG OFF ADVANCED NO_PACKAGE)
 endif()