that a screen saver must contain compiled C code for the correct
+On Mac OS X 10.6 and Mac OS X 10.7 you cannot use PyObjC to write a screen saver
+because the screen saver engine uses Objetive-C Garbage Collection and
+that is not supported by PyObjC.
+Screen savers work again in OS X 10.8.
For OSX 10.6 or later on Intel CPUs the binary must contain support
for the x86_64 (64-bit Intel) code, on earlier OSX releases support
for i386 (32-bit Intel) is needed.