Having the same issue trying to run in iOS simulator. Help!
I followed the suggestions earlier in the thread but continue to get the following:
sencha package run simulator.json
[ERROR] The current working directory (/Users/glenn_graham/Sites/citybars) is not a recognized Sencha SDK or application folder
The application was successfully packaged
[DEBUG] Session could not be started: Error Domain=DTiPhoneSimulatorErrorDomain Code=2 UserInfo=0x100615680 "Simulator session timed out."