Entitlements mismatch error in xcode

You can open your .mobileprovision and .entitlements file by using TextMate. By doing so, you can compare both files and figure out what's different between them.

You can find your provisioning profiles in this path: /Users/_your_user/Library/MobileDevice/Provisioning Profiles

Or via Xcode, through these steps:

1) opens Xcode, 2) Preferences (command + , ) , 3) accounts , 4) select your account , 5) select your team, 6) view details. A new window will open containing all provisioning profile installed, right click on the one you've been looking for and then "show in finder"