Stop TeXShop memory leak

Long TeXShop writing sessions (several weeks in my case) reveal that TeXShop leaks memory. I ended up with a 5Gb process without any open file!

This seems to be an old incomprehensible issue but it has a simple solution, just run the following line in your terminal

   defaults write TeXShop ReleaseDocumentClasses 0

If you want to check the status of the variable before changing it:

   defaults read TeXShop ReleaseDocumentClasses

Source: https://sourceforge.net/p/texshop/bugs/87/?SetFreedomCookie