* a better way to read the CFBundleShortVersionString would be to use `defaults`: replace the exec grep; grep -v by exec `defaults read &#x27;{}&#x27; CFBundleShortVersionString`<p>* there are applications which use the Sparkle framework but not the Autoupdate app, and apparently applications which contain Autoupdate.app but it doesn&#x27;t have a CFBundleShortVersionString. On my machine, 43 application bundles contain Sparkle, 10 have an Autoupdate.app and 9 have an Autoupdate.app with a CFBundleShortVersionString plist key. Reading Sparkle.framework&#x2F;Versions&#x2F;A&#x2F;Resources&#x2F;Info.plist would be more reliable, but even that is not perfect, some of those don&#x27;t have a CFBundleShortVersionString, only a CFBundleVersion (those are most likely the downright ancient Sparkle versions, we&#x27;re talking 1.0 and 1.1)