diff --git a/mkspecs/features/mac/sdk.prf b/mkspecs/features/mac/sdk.prf
index ece0e27536..f5b1639a5d 100644
--- a/mkspecs/features/mac/sdk.prf
+++ b/mkspecs/features/mac/sdk.prf
@@ -31,9 +31,9 @@ for(tool, $$list(QMAKE_CC QMAKE_CXX QMAKE_FIX_RPATH QMAKE_AR QMAKE_RANLIB QMAKE_
 }
 
 # We use xml as the output format instead of json since plutil on 10.6 does not have that option
-QMAKE_MAC_PLATFORM_NAME = $$system("plutil -convert xml1 \"$$QMAKE_MAC_SDK_PATH/SDKSettings.plist\" -o - | " \
+QMAKE_MAC_PLATFORM_NAME = $$system("/usr/bin/plutil -convert xml1 \"$$QMAKE_MAC_SDK_PATH/SDKSettings.plist\" -o - 2>/dev/null | " \
     "sed '/^<!DOCTYPE/d' | " \ # Don't look up http://www.apple.com/DTDs/PropertyList-1.0.dtd
-    "PERL5LIB= xpath 'string(//key[.=\"PLATFORM_NAME\"]/following-sibling::*[1])' 2>&1 | " \
+    "PERL5LIB= xpath 'string(//key[.=\"PLATFORM_NAME\"]/following-sibling::*[1])' 2>/dev/null | " \
     "sed 's/.*Value: \\(.*\\)/\\1/'")
 
 isEmpty(QMAKE_MAC_PLATFORM_NAME): error("Could not resolve platform name for SDK '$$QMAKE_MAC_SDK'")