Adobe Photoshop 2015 will not display in Extension Manager 220.127.116.11 on OS X 10.9.5 and 10.11 (beta 6) but it's displaying perfectly on 10.10.4. I rely on extension manager for add-on management and testing. I went through a few forums and it appears to be a common issue for other users but I'm unable to find a fix.
It should look like this. (screen of 10.10.4)
Instead it looks like this. (screen of 10.9.5 and 10.11)