I work with Lyx for OS X El Capitan vs. 10.11. I tried downloading and
reinstalling Lyx before posting this but the problem remains. 

The problem is that when I try to enter mathematical formulas using the
menus at the bottom of the screen (e.g. greek letters, arrows,
equality/inequality relations etc.) nothing happens: I click on a symbol,
e.g. alpha, with no result. I am not sure, but I think this started after I
installed El Capitan recently - Lyx has worked perfectly on my Mac for some
years now.

I've seen reports on this list of problems - different from this one - after
El Capitan installation and the remedy seems to be to remove something
called System Integrity Protection. I have not tried this - not sure how to
do it - and it seems like a really bad solution to the problem.

Hope someone can help!


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