Using Kaleidoscope with PhpStorm

Eventually sussed it - if anyone comes here in future, you want to install KSDiff (also available from the Kaleidoscope site), then go to the External Diff Tools tab in Storm, and set it up as:

  • External Compare Tool: /usr/local/bin/ksdiff
  • Parameters: %1 %2

Then open Kaleidoscope and leave it running - if you don't, nothing will happen.