Although TeX was quite capable, it was designed and implemented before high performance graphics workstations were available. To proofread your work, you needed to run the TeX typesetting and printing back end subsystems.

Using the original TeX system required you to encode your document using either TeX primitives or descriptive markup tags from a macro package such as LaTeX. TeXmacs can produce Postscript and PDF representations of the document allowing use of the macOS imaging system to view and print the finished document. TeXmacs saves the document using Scheme lisp and can produce an XML equivalent. TeXmacs is a reimplementation in Scheme and C++ of Donald Knuth’s TeX typesetting model designed to permit direct interactive creation of the document in a what you see is what you get fashion. TeXmacs is an engineering and science writing tool that is sort of what you see is what you get. TeXmacs represents the document in Scheme or XML rather than TeX language.

Revised introduction to clearly indicate that TexMacs is a direct rendering reimplementation of TeX as opposed to a visual tool like LyX for editing TeX documents and then run the TeX tool chain to produce finished output.To learn more about using TeXmacs in a MacOS environment, read on. TeXmacs is a reimplementation of Donald Knuth’s TeX document preparation system that offers a unique advantage, the ability to embed interpreted computing language sessions using tools like Octave, Python, Maxima, etc. TeXmacs is a technical writing system for use by scientists and engineers.

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