I don't think Scala will ever be for Xcode. First I started with TextMate - get GetBundles, filter out the "scala" packages and find the latest github and install it. It was perfect for several months.
Extracting interest, I then switched to IntelliJIdea (currently 10.5.2) with the Scala plugin (latest version) and will never return to TM. This is just fine. I would really like to do the same. NetBeans and Eclipse have also been tested, but both are garbage in terms of Scala support - compared to IntelliJ. Btw - don't forget about SBT plugin support. Very good integration inside IntelliJ IDE.
source share