I actually use 4 text editors on my Mac. When I want to do serious coding I use Vim. When I want to jot something down real quick, I use TextEdit, because it's right on my dock and I can bring it...
When I try to run a bash shell script I made in Vim, and it has an error in it, the shell will tell me what the error is and what line it's on. GCC does the same thing for C files, and so on. There...
I use Vim. Not gVim, the command line version. There is a learning curve, but it's well worth it. Vim provides syntax highlighting, spell-checking, macros, multiwindow editing, scripting...