Ogre 1.8.1 patch file from http://www.ogre3d.org/forums/viewtopic.php?f=4&t=73613 modified for to match 1.8.1 https://sourceforge.net/projects/ogre/files/ogre/1.8/1.8.1/ogre_src_v1-8-1.tar.bz2

ogre1.8.1_osx.patch

diff --git a/CMake/Templates/OGRE.pc.in b/CMake/Templates/OGRE.pc.in
index 15e827f..65a3089 100644
--- a/CMake/Templates/OGRE.pc.in
+++ b/CMake/Templates/OGRE.pc.in
@@ -8,5 +8,5 @@ Name: OGRE
 Description: Object-Oriented Graphics Rendering Engine
 Version: @OGRE_VERSION@
 URL: http://www.ogre3d.org
-Libs: -L${libdir} -lOgreMain@OGRE_LIB_SUFFIX@ @OGRE_ADDITIONAL_LIBS@
+Libs: -L${libdir} -lOgreMain@OGRE_LIB_SUFFIX@ @OGRE_ADDITIONAL_LIBS@ -F${libdir}/Release -framework Ogre
 Cflags: -I${includedir} -I${includedir}/OGRE @OGRE_CFLAGS@
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e290767..36cba1b 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -217,10 +217,11 @@ if (OGRE_BUILD_PLATFORM_APPLE_IOS)
   include_directories("${OGRE_SOURCE_DIR}/OgreMain/include/iOS")
 
   # Set build variables
-  set(CMAKE_OSX_SYSROOT iphoneos)
+  set(XCODE_ATTRIBUTE_SDKROOT iphoneos)
+  execute_process(COMMAND xcodebuild -version -sdk "${XCODE_ATTRIBUTE_SDKROOT}" Path | head -n 1 OUTPUT_VARIABLE CMAKE_OSX_SYSROOT)
+  string(REGEX REPLACE "(\r?\n)+$" "" CMAKE_OSX_SYSROOT "${CMAKE_OSX_SYSROOT}")
   set(CMAKE_OSX_DEPLOYMENT_TARGET "")
   set(CMAKE_EXE_LINKER_FLAGS "-framework Foundation -framework CoreGraphics -framework QuartzCore -framework UIKit")
-  set(XCODE_ATTRIBUTE_SDKROOT iphoneos)
   set(XCODE_ATTRIBUTE_GCC_UNROLL_LOOPS "YES")
   set(XCODE_ATTRIBUTE_CODE_SIGN_IDENTITY "iPhone Developer")
   set(XCODE_ATTRIBUTE_GCC_PRECOMPILE_PREFIX_HEADER "YES")
@@ -237,9 +238,9 @@ if (OGRE_BUILD_PLATFORM_APPLE_IOS)
   remove_definitions(-msse)
 elseif (APPLE AND NOT OGRE_BUILD_PLATFORM_APPLE_IOS)
 
-  # Set 10.5 as the base SDK by default
   set(XCODE_ATTRIBUTE_SDKROOT macosx)
-  set(CMAKE_OSX_SYSROOT macosx)
+  execute_process(COMMAND xcodebuild -version -sdk "${XCODE_ATTRIBUTE_SDKROOT}" Path | head -n 1 OUTPUT_VARIABLE CMAKE_OSX_SYSROOT)
+  string(REGEX REPLACE "(\r?\n)+$" "" CMAKE_OSX_SYSROOT "${CMAKE_OSX_SYSROOT}")
   set(CMAKE_OSX_DEPLOYMENT_TARGET 10.5)
 
   if (NOT CMAKE_OSX_ARCHITECTURES)