Aquamacs , the Emacs editor Mac users love, is Aquamacs . Aquamacs allows you to write text from LaTeX manuscripts, to-do lists, and from C to Cobol, Java to Python to Lisp. Aquamacs behaves and looks like other Mac programs, even though it is still the powerful GNU Emacs that millions have come to love.
Emacs is a text editor with legendary power and configuration, but it also has a complex interface that is very different to the Mac way of doing things. Aquamacs manages the Emacs tiger. It has standard Apple shortcuts in addition to the Emacs ones, nice fonts, tabs, one file per window, international input methods and Apple Help manuals. Aquamacs supports a variety of programming languages and markups: HTML, C/C++ Java, Python, Perl, Tcl and R (S )...). These modes include syntax highlighting and additional functions. Aquamacs can be used to read news and e mail, just like any Emacs.
The software is free but it is donationware. To support development, please consider donating.