Question: what is the latest os update for mac
[{'answer': 'macOS 10.13 High Sierra', 'provenance': [{'wikipedia_id': '20640', 'title': 'MacOS', 'start_paragraph_id': 29, 'start_character': 16, 'end_paragraph_id': 29, 'end_character': 39, 'bleu_score': 1.0, 'section': 'Section::::History.:macOS.\n'}]}]