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Slow Ethernet speeds

I have a MacBook Pro 2017 running is 10.14.6 and a new Mac Mini 3.2 i7 running is 10.14.6 and both of them work fine with wifi. But when I use an Ethernet cable connection it is slower than the wifi speeds. Super frustrating.


My Ethernet cables are CAT 6. I’ve tried 2 different cables.


Comcast came to my home and checked the connection only to say it must be my computers and to contact Apple. Any ideas?

Posted on Jun 16, 2021 12:54 PM

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Posted on Jun 17, 2021 4:53 AM

Select "About this Mac..." from the Apple menu. Then, click System Report

button.


On the left side of the window select Network. You should then see a list

of all network devices. Select the ethernet device from the list. Scroll down

to the bottom to the "Ethernet" item. What is listed under "Medium Sub-Type".

What is listed there? this is an indicator of the connection type. For a gigabit

connection, it should be 1000baseT. If it is 100BaseT you have a wiring issue

somewhere: cable, connector, or slow device somewhere in the chain from

your computers to your router.


FWIW, an ethernet cable has 4 pairs of wires and all pairs are needed for gigabit

ethernet. If one pair in the chain is faulty (cable or connector), the communication

will revert to100BaseT as it only uses two pairs.

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Slow Ethernet speeds

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