diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4919b78..758eccb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,8 +36,6 @@ set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "" CACHE INTERNAL "Unused")
 set(CMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO "" CACHE INTERNAL "Unused")
 set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "" CACHE INTERNAL "Unused")
 
-set(CMAKE_OSX_ARCHITECTURES i386 ppc x86_64 CACHE STRING "change to needed architecture for a smaller library" FORCE)
-
 PROJECT(portmidi)
 
 if(UNIX)
diff --git a/pm_common/CMakeLists.txt b/pm_common/CMakeLists.txt
index e171047..aafa09c 100644
--- a/pm_common/CMakeLists.txt
+++ b/pm_common/CMakeLists.txt
@@ -22,7 +22,7 @@ else(APPLE OR WIN32)
 endif(APPLE OR WIN32)
 
 if(APPLE)
-  set(CMAKE_OSX_SYSROOT /Developer/SDKs/MacOSX10.5.sdk CACHE 
+  set(CMAKE_OSX_SYSROOT / CACHE 
       PATH "-isysroot parameter for compiler" FORCE)
   set(CMAKE_C_FLAGS "-mmacosx-version-min=10.5" CACHE 
       STRING "needed in conjunction with CMAKE_OSX_SYSROOT" FORCE)
@@ -54,10 +54,6 @@ if(UNIX)
 
     include_directories(${CMAKE_OSX_SYSROOT}/Developer/Headers/FlatCarbon)
     set(FRAMEWORK_PATH ${CMAKE_OSX_SYSROOT}/System/Library/Frameworks)
-    set(COREAUDIO_LIB "${FRAMEWORK_PATH}/CoreAudio.framework")
-    set(COREFOUNDATION_LIB "${FRAMEWORK_PATH}/CoreFoundation.framework")
-    set(COREMIDI_LIB "${FRAMEWORK_PATH}/CoreMIDI.framework")
-    set(CORESERVICES_LIB "${FRAMEWORK_PATH}/CoreServices.framework")
     set(PM_NEEDED_LIBS ${COREAUDIO_LIB} ${COREFOUNDATION_LIB}
                              ${COREMIDI_LIB} ${CORESERVICES_LIB}
         CACHE INTERNAL "")
diff --git a/pm_dylib/CMakeLists.txt b/pm_dylib/CMakeLists.txt
index f693dd6..1dc5cd6 100644
--- a/pm_dylib/CMakeLists.txt
+++ b/pm_dylib/CMakeLists.txt
@@ -49,10 +49,6 @@ if(UNIX)
 
     include_directories(${CMAKE_OSX_SYSROOT}/Developer/Headers/FlatCarbon)
     set(FRAMEWORK_PATH ${CMAKE_OSX_SYSROOT}/System/Library/Frameworks)
-    set(COREAUDIO_LIB "${FRAMEWORK_PATH}/CoreAudio.framework")
-    set(COREFOUNDATION_LIB "${FRAMEWORK_PATH}/CoreFoundation.framework")
-    set(COREMIDI_LIB "${FRAMEWORK_PATH}/CoreMIDI.framework")
-    set(CORESERVICES_LIB "${FRAMEWORK_PATH}/CoreServices.framework")
     set(PM_NEEDED_LIBS ${COREAUDIO_LIB} ${COREFOUNDATION_LIB}
                              ${COREMIDI_LIB} ${CORESERVICES_LIB}
         CACHE INTERNAL "")