ɪt wʌz fˈɜːst ɪŋklˈuːdᵻd ˌɔn nˈuː mˈæk bˈʊks ʃˈɪpɪŋ ɚɹˈaʊnd ðə tˈaɪm ʌv mˈeɪ twˈɛnti fˈoːɹ, tˈuː θˈaʊzənd sˈɪks, æz pˈɑːɹt ʌvðɪ ˈɛkskˈoʊd dɪvˈɛləpɚ tˈuːlz.
It was first included on new MacBooks shipping around the time of May 24, 2006, as part of the Xcode developer tools.