diff --git a/CMakeLists.txt b/CMakeLists.txt
index 028eca0..2cbcadc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,9 @@ else()
     set(BOOST_BOOTSTRAP "bootstrap.bat")
 endif()
 
+set(SG_DEPS OSG)
+set(FG_DEPS SimGear)
+
 if(APPLE)
 
     set(BOOST_ARGS link=static stage --with-system)
@@ -21,10 +24,22 @@ if(APPLE)
            BUILD_COMMAND ./bjam ${BOOST_ARGS}
            BUILD_IN_SOURCE 1
            INSTALL_COMMAND ./b2 install ${BOOST_ARGS})
+           
+           
+    ExternalProject_Add(libSvn
+        DOWNLOAD_COMMAND URL http://flightgear.simpits.org:8080/job/Mac-Subversion-libs/lastSuccessfulBuild/artifact/dist/*zip*/dist.zip
+        PREFIX ${CMAKE_BINARY_DIR}
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND ""
+        INSTALL_COMMAND cp -r ${CMAKE_BINARY_DIR}/src/libSvn/include ${CMAKE_INSTALL_PREFIX} && cp -r ${CMAKE_BINARY_DIR}/src/libSvn/lib ${CMAKE_INSTALL_PREFIX}
+    )
+           
+    list(APPEND SG_DEPS Boost libSvn)
 endif()  # of Apple
 
 set (OSG_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX})
 
+# OpenSceneGraph configuration
 if (APPLE)
     SET(SDKROOT /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk)
     # force disable Qt and Jasper, and ensure an SDKROOT is set, or
@@ -32,6 +47,7 @@ if (APPLE)
     SET(OSG_CMAKE_ARGS -DCMAKE_OSX_SYSROOT=${SDKROOT} 
         -DOSG_USE_QT=0 
         -DJASPER_LIBRARY= 
+        -DSDL_LIBRARY:FILEPATH=
         -DCMAKE_OSX_ARCHITECTURES=x86_64
         -DCMAKE_OSX_DEPLOYMENT_TARGET=10.7
     )
@@ -41,13 +57,13 @@ if (APPLE)
 
 elseif(MSVC)
 	set( OSG_MSVC "msvc" )
-  if (${MSVC_VERSION} EQUAL 1700)
+    if (${MSVC_VERSION} EQUAL 1700)
       set( OSG_MSVC ${OSG_MSVC}110 )
-  elseif (${MSVC_VERSION} EQUAL 1600)
+    elseif (${MSVC_VERSION} EQUAL 1600)
       set( OSG_MSVC ${OSG_MSVC}100 )
-  else (${MSVC_VERSION} EQUAL 1700)
+    else (${MSVC_VERSION} EQUAL 1700)
       set( OSG_MSVC ${OSG_MSVC}90 )
-  endif (${MSVC_VERSION} EQUAL 1700)
+    endif (${MSVC_VERSION} EQUAL 1700)
   
 	SET(OSG_CMAKE_ARGS
 		-DACTUAL_3RDPARTY_DIR:PATH=${CMAKE_BINARY_DIR}/3rdParty
@@ -62,13 +78,15 @@ elseif(MSVC)
 	# for compatability with MSVC directory layout
 	set(OSG_INSTALL_PREFIX ${CMAKE_BINARY_DIR}/install/${OSG_MSVC}/OpenSceneGraph)
 	SET(OSG_SOURCE URL http://www.openscenegraph.org/downloads/developer_releases/OpenSceneGraph-3.1.4.zip)
+    
+    list(APPEND OSG_DEPS WinDeps)
 else()
     # normal OSG
     SET(OSG_SOURCE URL http://www.openscenegraph.org/downloads/developer_releases/OpenSceneGraph-3.1.4.zip)
 endif()
 
 if (MSVC)
-# download 3rdpart dependeancies zip, including boost
+# download 3rdparty dependeancies zip, including boost
 	ExternalProject_Add(WinDeps
 		DOWNLOAD_COMMAND URL http://files.goneabitbursar.com/fg/fgfs-win32-VS100-3rdParty+OSG-20120411.zip
 # extract to current root
@@ -78,43 +96,43 @@ if (MSVC)
 		BUILD_COMMAND ${CMAKE_SOURCE_DIR}/installWinDeps.bat
 		INSTALL_COMMAND ""
 	)
-endif() # of Windows
+    
+    
+	list(APPEND SG_CMAKE_ARGS -DBOOST_ROOT=${CMAKE_BINARY_DIR})
+	list(APPEND FG_CMAKE_ARGS -DBOOST_ROOT=${CMAKE_BINARY_DIR})
+endif(MSVC) # of Windows
 
 ExternalProject_Add(OSG
-	DEPENDS WinDeps
+	DEPENDS ${OSG_DEPS}
     PREFIX ${CMAKE_BINARY_DIR}
     ${OSG_SOURCE}
     BINARY_DIR osgbuild
     CMAKE_ARGS ${OSG_CMAKE_ARGS} -DCMAKE_INSTALL_PREFIX=${OSG_INSTALL_PREFIX}
 # force Release build of OpenSceneGraph
 #	BUILD_COMMAND "cmake --build . --config Release"
-    )
+)
 
 set(SG_CMAKE_ARGS -DENABLE_PACKAGE=1)
 set(FG_CMAKE_ARGS "")
 
-if (FALSE)
-ExternalProject_Add(OpenRTI
-    PREFIX ${CMAKE_BINARY_DIR}
-    DOWNLOAD_COMMAND GIT_REPOSITORY git://gitorious.org/openrti/openrti.git
-    BINARY_DIR rtibuild 
-    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
+# FIXME install of OpenRTI is failing on Windows, files in PREFIX/share which
+# are ending up in C:/Program Files/OpenRTI
+if (NOT MSVC)
+    ExternalProject_Add(OpenRTI
+        PREFIX ${CMAKE_BINARY_DIR}
+        DOWNLOAD_COMMAND GIT_REPOSITORY git://gitorious.org/openrti/openrti.git
+        BINARY_DIR rtibuild 
+        CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
     )
 	
+	list(APPEND SG_DEPS OpenRTI)
 	list(APPEND SG_CMAKE_ARGS -DENABLE_RTI=1)
 	list(APPEND FG_CMAKE_ARGS -DENABLE_RTI=1)
 endif()
 
-
-
-if (WIN32)
-	list(APPEND SG_CMAKE_ARGS -DBOOST_ROOT=${CMAKE_BINARY_DIR})
-	list(APPEND FG_CMAKE_ARGS -DBOOST_ROOT=${CMAKE_BINARY_DIR})
-endif()
-
 ExternalProject_Add(SimGear 
     PREFIX ${CMAKE_BINARY_DIR}
-    DEPENDS OSG
+    DEPENDS ${SG_DEPS}
     DOWNLOAD_COMMAND ""     # no need to download
     UPDATE_COMMAND       ""    # or update.
     SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/simgear
@@ -131,11 +149,13 @@ if (NOT WIN32)
 		CONFIGURE_COMMAND <SOURCE_DIR>/configure --prefix=${CMAKE_INSTALL_PREFIX} ${PLIB_ARGS}
 		BUILD_IN_SOURCE 1
 	)
+    
+    list(APPEND FG_DEPS PLIB)
 endif()
 
 ExternalProject_Add(FlightGear
     PREFIX ${CMAKE_BINARY_DIR}
-    DEPENDS SimGear OSG
+    DEPENDS ${FG_DEPS}
     DOWNLOAD_COMMAND ""     # no need to download
     UPDATE_COMMAND       ""    # or update.
     SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}/flightgear
diff --git a/flightgear b/flightgear
index 11c00af..ee1c8a8 160000
--- a/flightgear
+++ b/flightgear
@@ -1 +1 @@
-Subproject commit 11c00afaec8836a5f52bcf8832ff2d50e2f11523
+Subproject commit ee1c8a8d662a0398711ee17c53dd64d249d2e030