To turn on syntax highlighting when working with LESS files in Panic’s Coda (I’ve not upgraded to 2 yet):

1. Preferences
2. Editor
3. Near bottom of that dialogue window, under Custom Syntax Modes: , press the +
4. Type “less” for the extension
5. For the Syntax Mode, pull down and select CSS.
6. Press Okay.
7. Close Preferences
8. Re-open your LESS files. After opening, they should be highlighted like CSS files.

That’s it.

Many thanks to Bucsa Silviu for his tip!

Screenshots