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Your MAC address appears as either the Hardware Address or the Ethernet Address. Macintosh OS X 1. Click the Apple icon. 2. Select System Preferences. 3. Click the Network icon. 4. Click the TCP/IP tab. 5. From the Configure pulldown menu, select Built-in Ethernet. Your MAC address appears in the lower-left corner as the Ethernet Address. Broadband Link Tab Connection Details The View connection details link accesses the Broadband Link Details page, which displays technical information about you