Documentation for PHP debug states
Note: You must use ActiveStates distribution of Xdebug. It is built specifically for debugging in Komodo.
However, (at least for Mac) there is no “install directory” and thus no xdebug.so.
So… where does one get the ActiveStates distribution of Xdebug?
You can right click the application then select “Show Package Contents”. There is an install directory, OSX just makes it look like there isn’t.
Otherwise you can get Komodo debugging bits for any supported language and platform from: http://code.activestate.com/komodo/remotedebugging/
Hope that helps,