InDesign installation stalls at 42%

Question

Every time. I get this error message:
Activity Monitor shows Setup not responding, none of the processes with an Adobe CC icon appear to be not responding.
So far I've tried:
Hitting Retry and Cancel
Using Activity Monitor to quit ShellExtLoader
Quitting ShellExtLoader *prior* to starting the install - I got this error even though Activity Monitor showed that ShellExtLoader wasn't running at any time during the install attempt.
Restarting my Mac and trying all of the above
I've seen other unanswered threads with what sounds like the same issue - any help here?
Thanks,
Allen

Answer 1

Jeff A Wright wrote:
Uiarchitects the ShellExtLoader appears to be a conflicting process.  I would recommend restarting your computer and trying the installation again.  You may also want to look in your Activity Monitor for any applications you are not familiar with that may be running.
You can find information on how to utilize the Activity Monitor at Install log error "Exit Code: 19" | Creative Suite 5, CS5.5 - http://helpx.adobe.com/creative-suite/kb/install-log-error-exit-code.h tml.
Ah yes, restarting and trying again was #4 in my original post.
Plus, I used Activity Monitor to kill ShellExtLoader *before* doing the install, and still got the error, even though it wasn't running. (Per #3 in my original post).
I use Activity Monitor fairly regularly, but there are of course a lot of daemons and processes running on a regular basis that even advanced users aren't familiar with because they are invisible processes that might be normal system activities, related to an app, or who knows what. In this case, the only stalled process was ShellExtLoader.
Sounds like we're thinking along the same lines, but those standard approaches haven't born fruit. I'm hoping that if others have run into different versions of this, maybe something about it will ring a bell with someone who's seen it before and deduced a fix.
Thanks!