From http://www.jwz.org/xscreensaver/xscreensaver-5.24.tar.gz

[xscreensaver] / OSX / Sparkle.framework / Versions / Current

diff --git a/OSX/Sparkle.framework/Versions/Current b/OSX/Sparkle.framework/Versions/Current
new file mode 120000 (symlink)
index 0000000..8c7e5a6
--- /dev/null
+++ b/OSX/Sparkle.framework/Versions/Current
@@ -0,0 +1 @@
+A
\ No newline at end of file