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https://projectresearch.co.kr/2008/07/11/mac-%ea%b3%bc-google-%ec%a3%bc%ec%86%8c%eb%a1%9d-%eb%8f%99%ea%b8%b0%ed%99%94-%ed%95%98%eb%8a%94-%eb%b0%a9%eb%b2%95/
Mac 과 Google 주소록 동기화 하는 방법