Question: when did apple introduce the mac os system that prevailed until mac os x
[{'answer': '1984', 'provenance': [{'wikipedia_id': '21347643', 'title': 'Macintosh operating systems', 'start_paragraph_id': 1, 'start_character': 206, 'end_paragraph_id': 1, 'end_character': 210, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21347643', 'title': 'Macintosh operating systems', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 409, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11415461443858203136}, 'section': 'Section::::Abstract.'}]}]