I upgraded both my Macs to the El Capitan beta and could no longer convert Org Mode or Markdown files to PDFs. My scripts were returning an error: “command not found: pdflatex”. Where could it be?
I soon noticed that I had lost the symlink to the TeX distribution, which is usually /usr/texbin. Easy enough to recreate it, I thought, but was wrong. Apparently, in El Capitan you're not allowed to write to /usr, even using sudo. Digging around I found this PDF on tug.org which explained things in detail.
The symlink should be at /Library/TeX/texbin instead. So it was a matter of running the following and updating my $PATH
That made the TeX distribution available again and all is well.