I haven't had other reports of problems with the installer on OSX El Capitan (and it installed with no problems on El Capitan on my test machine), so I'm afraid I don't know what might be causing this. Any other users out there who have encountered (and hopefully solved) this issue? If so, please chime in.  Doug

--Re: tracker don't work (osx el capitan) Hi:  I try the run tracker in OSX El Capitan but don't > work. Any possible solution?