It’s easy to setup the Rupee font on your Mac. Follow these steps below and you should be able to get Rupee symbol working.
1. Get the Rupee Font from http://blog.foradian.com/rupee-font-version-20
2. Copy the downloaded .TTF file the Machine’s font folder (not user/system) Macintosh HD > Library > Fonts
3. Open TextEdit (or similar) and change the font to Rupee_Foradian.
4. Press the grave? accent (`)key on your keyboard. This key is just above the TAB key and right below the ESC key. Voila!
Instructions for getting the font work on Windows can be found here.