Like others have noted, after upgrading to El Capitan, there was a required reconfiguration for MacTeX. I completed the fix specified here: https://tug.org/mactex/UpdatingForElCapitan.pdf. So, I changed the Path settings for (pdf)TeX from /usr/texbin to /Library/TeX/texbin in TeXShop preferences, and I changed /usr/texbin/pdflatex to /Library/TeX/texbin/pdflatex and /usr/texbin/xelatex to /Library/TeX/ texbin/xelatex, in BibDesk preferences.
However, if I try to compile a document, I still get the following error report:
/Library/TeX/texbin/pdflatex does not exist. TeXShop is a front end for TeX, but you also need a TeX distribution. Perhaps such a distribution was not installed or was removed during a system upgrade. If so, go to http://tug.org/MacTeX and follow the instructions to (re)install MacTeX. A less likely possibility is that a tool path is incorrectly configured in TeXShop preferences. This can happen if you are using the macports or fink distributions
I’m now not sure if I should really re-install, or am I missing some bit of the fix.
I also tried going to terminal and doing which pdftex, but it returned nothing. Reinstall?
Best Answer
I had the same problem after installing El Capitan.
Did you test if you are able to use pdflatex running from the terminal? In my case it worked.
After knowing that I used
which pdflatexto see where the pdflatex is, andthe result was/Library/TeX/texbin/pdflatex. Then I went to this directory, and I noticed that most of its content (including the pdflatex) are actually links to other things, and in the case of pdflatex it is on the path:/usr/local/texlive/2015/bin/x86_64-darwin/.I changed the path settings in TeXShop to this directory and it solved the problem for me.