[grunt-notify] growl: growlnotify wasn't found. If you were hoping to use Growl, make you sure you have their command line script called Growlnotify. Mac: http://growl.info/downloads or Windows: http://www.growlforwindows.com/gfw/help/growlnotify.aspx and put it in your path. You should be able to type growlnotify --version and get something back.
[grunt-notify] IS_WINDOWS: false
[grunt-notify] PROGRAM_FILES: undefined
[grunt-notify] PROGRAM_FILES_X86: undefined
[grunt-notify] fullPathToApplication: false
[grunt-notify] snarl: Snarl not available for this OS.
[grunt-notify] os: Darwin
[grunt-notify] version: 15.3.0
[grunt-notify] IS_MAC: true
[grunt-notify] MOUNTAIN_LION: true
[grunt-notify] notification_center: Will use Notification Center
[notification-center] cmd: /Users//node_modules/grunt-notify/lib/platforms../bin/Grunt.app/Contents/MacOS/Grunt
[notification-center] args: -title Pro -message Done, without errors.
Done, without errors.
5.2.0 works but not 5.7.0
Here is the output when the success hook fires: