I made a keyboard layout containing lots of maths symbols that I commonly use in LaTeX.
To try it yourself:
- Copy the MathUnicode.keylayout file into your ~/Library/Keyboard Layouts directory.
- Log out and back in again.
- In the Language & Text pane of System Preferences, select the Input Sources tab, and then the MathUnicode keyboard.
To use this keylayout in LaTeX, include the MathUnicode.sty package. This package uses the inputenc package to convert the Unicode characters into LaTeX macros.