Whats new in version 3.22:• If the option key is pressed, the "Typeset" menu changes to "Trash Aux & Typeset". Selecting it trashes aux and related files before typesetting. Recall that command-T is a keyboard shortcut for "Typeset". Similarly option-command-T is a keyboard shortcut for "Trash Aux & Typeset." This ingenious addition was suggested and made by Paul Smyth.
• There is a new engine for pythontex in ~/Library/TeXShop/Engines/Inactive. This folder also has a README explaining how to install pythontex, and a tex source file from the author of pythontex which can be used to test the engine and simultaneously see some of the features of pythontex in use.
• There is a new engine for Sage in ~/Library/TeXShop/Engines/Inactive/Sage. The method of installing sagetex.sty in TeX Live explained in "About Sage" in the Sage directory has also changed. These changes was suggested by Daniel Grambihler and improve the ease of use of Sage in TeX.
Publisher review:TeXShop is a preview progamme TeX for Mac OS X, written in Cocoa. Since PDF is the original format on Mac OS X, TeXShop uses "pdftex" and "pdflatex \'instead of\' tex \'and\' latex \'for composition, these programs the standard teTeX distribution teX produce Result PDF rather than DVI result.
These applications create standard PDF documents rather than dvi files, hence it is easier to display the result on Mac OS X. TeXShop can be used with any TeX distribution but does not actually include TeX.
Operating system:Mac OS X 10.7.0 or later
TeXShop 3.22 details 
