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The Ethernet capabilities of each recent -- G3 and later -- Mac are listed below. For complete specs on a particular system, click on the name of the Mac (left column). For all Macs that match a specific Ethernet type -- courtesy of EveryMac.com's Ultimate Mac Sort -- click the Ethernet type of interest (right column).
Please note that this listing provides the standard Ethernet capability of Macs as shipped -- of course, systems that support expansion cards can support alternate configurations with a different than stock configuration. Please also note that "1000Base-T" and "Gigabit" can be used interchangeably.
In general, please additionally be mindful of asterisks, as these indicate that particularly important details are provided on the complete specs page.
In addition to specs listed By Capability, EveryMac.com offers Apple Mac specs listed By Year, By Identifier, By Processor, By Case Type, and By Global Original Prices. Currently Shipping Macs also may be of interest.
If you are not sure which Mac you have, look it up by Order Number, Model Number, EMC Number, Model Identifier or Serial Number "Snippet," with EveryMac.com's Ultimate Mac Lookup feature. If you need help, refer to Mac Identification.