I do have adium on the latest release (1.13.1), but aside from that I see the same thing, here&#x27;s a summary of the Sparkle CFBundleShortVersionString on my system (dates added by myself):<p><pre><code>     9 	1.5 Beta
     2 	1.5 Beta 5
    12 	1.5 Beta 6
     1 	1.5
     1 	1.6
     3 	1.8.0
     1 	1.9.0
     2 	1.10.0
     1 	1.12.0
     1 	1.13.1
</code></pre>
<i>However</i> note that Sparkle 1.5 isn&#x27;t even compatible with El Cap, I expect a number of these are in software I haven&#x27;t launched in years and have just been carrying from migration to migration, the up-to-date software may be using an up-to-date sparkle.<p>Or not.<p>Probably not though, considering Acorn 5.2.1 (released in December 2015, the same day as Sparkle 1.12.0) uses Sparkle 1.9.0 (released in January 2015)