--- old/common/makefiles/MakeBase.gmk	2013-03-28 17:12:27.916957030 +0100
+++ new/common/makefiles/MakeBase.gmk	2013-03-28 17:12:27.816939731 +0100
@@ -381,9 +381,15 @@
 	$(CP) -f -r -P '$<' '$(@D)'
 endef
 else ifeq ($(OPENJDK_TARGET_OS),macosx)
+# On mac, extended attributes sometimes creep into the source files, which may later 
+# cause the creation of ._* files which confuses testing. Clear these with xattr if
+# set. Some files get their write permissions removed after being copied to the 
+# output dir. When these are copied again to images, xattr would fail. By only clearing
+# attributes when they are present, failing on this is avoided.
 define install-file
 	$(MKDIR) -p $(@D)
-	$(CP) -fpRP '$<' '$@'
+	$(CP) -fRP '$<' '$@'
+	if [ -n "`$(XATTR) -l '$@'`" ]; then $(XATTR) -c '$@'; fi
 endef
 else
 define install-file