IMac 21.5" A1418. iMac 21.5". iMac18,1 Mid 2017: MMQA2LL/A (2.3 GHz Core i5). iMac18,1 Mid 2017: MHK03LL/A (2.3 GHz Core i5). 1 - Microphone Cable. This microphone attaches to the interior of the housing, behind the "chin".
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