diff --git a/installer/lib/wrapper/macosx/README.txt b/installer/lib/wrapper/macosx/README.txt
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+OSX instructions
+----------------
+
+Make the wrapper "quadfat" using lipo:
+
+	lipo -create wrapper-macosx-universal-32 wrapper-macosx-universal-64 -output i2psvc
+	lipo -create libwrapper-macosx-universal-32.jnilib libwrapper-macosx-universal-64.jnilib -output libwrapper.jnilib
+
+Then strip the wrapper:
+	strip i2psvc
+
+The jnilib file does not need to be stripped.