Mactex error - pdftex does not exist
## Problem Statement
Opening a valid .tex file using TeXShop to generate a pdf file resulted in the following error and suggested that the mactex installation was either missing or corrupt
/usr/texbin/pdflatex does not exist
Resolution
Instead of re-installing, the problem was fixed by changing the default configured pdftex engine path setting in TeXShop. (TeXShop > Preferences > Engine > Path)
Obtain correct bath by running the following command on the terminal
$ which pdftex
/Library/TeX/texbin/pdftex