After download the Spine and double click the Spine.app. The app didn't start. The console with error like this.
10/2/13 11:50:03.262 AM com.apple.launchd.peruser.501: ([0x0-0x82e82e].Spine) Job failed to exec(3) for weird reason: 13
10/2/13 11:50:03.265 AM Dock: no information back from LS about running process