|Just switched to El Capitan (OS X 10.11.1).|
Ran into two issues:
1. Tex moved due to the new protection methods that prevent mortals writing to /usr/bin. No big deal, but you have to switch /Library/TeX/texbin/pdflatex/pdflatex
2. The internal PDF Viewer appears to hang (beach ball — have to Force Quit toolbox). Switching to using the external viewer (Adobe Acrobat DC) works fine. The PDF file exists and is viewable even while toolbox is hung.