I can't seem to find a good post for turning on syntax highlighting or intellisense for jquery/jquery mobile in Aptana Studio 3 for Mac.
What I have found is out of date or the instructions don't match the version I have installed (like this SO post.
Is it possible in Studio 3 for Mac?
Well right after I posted I found this answer on a SO post (which like all others didn't have the correct instructions, but this one was close enough to where I managed to find it)
Here's what I did:
1) Right click the project folder -> Properties
2) Click Formatter
3) Check 'Enable project specific settings'
4) Click Ok