On my new OSX Mavericks install, I wanted to give Rubymine a try and just can\'t get the debugger working (although i managed to get it working on Windows 7 with IntelliJ an
You need to get the source files since they aren't included.
gem install debugger-ruby_core_source
Then try again.
Also, since I've found this sometimes isn't set correctly in Rubymine, in the menu bar go to "Rubymine" -> "preferences" -> "Ruby SDK and Gems" and make sure it is pointed to the version of Ruby you are expecting.