MacTeX is described as 'redistribution of TeX Live, a typesetting environment. While TeX Live is designed to be cross-platform (running on Unix, Mac OS X, and Windows), MacTeX includes Mac-specific utilities and front-ends'. There are seven alternatives to MacTeX for Mac, Windows, Linux, Haiku and BSD. The best alternative is LaTeX, which is both free and Open Source. Other great apps like MacTeX are TeXstudio (Free, Open Source), Texmaker (Free, Open Source), TeX Live (Free, Open Source) and Texpad (Paid).
LaTeX is a document markup language and document preparation system for the TeX typesetting program. The term LaTeX refers only to the language in which documents are written, not to the editor used to write those documents. In order to create a document in LaTeX, a .
TeXstudio is an integrated environment for writing LaTeX documents. Our goal is to make writing LaTeX as easy and comfortable as possible. Therefore TeXstudio has numerous features like syntax-highlighting, integrated viewer, reference checking and various assistants.
TeX Live is an easy way to get up and running with the TeX document production system. It provides a comprehensive TeX system with binaries for most flavors of Unix, including GNU/Linux, and also Windows.