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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?
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.
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.
Let me repeat…I have both a MacBook Pro and a Mac mini. Re read my post. They are both running 10.14.6
Using the Apple adapter, and with wifi turned off, the speeds are super slow. I have the fastest internet from Comcast. I checked my DNS and it says connected with a green light.
One cable is 10 feet. The other cable is 25 feet. They both worked before when using PC computer. Nothing is in between. The Ethernet goes straight in to Mac mini. I have a modem/router from xfinity, the latest one.
Super slow is tested by ookla. And many other speed tests that are never consistent. But mostly read 100 download. WIFI and upload work fine. Also downloading a document from a site goes very very slowly.
I’ve been working on this for days, so yeah of course I tried both of my cables. And a third from Comcast.
Both computers used Time Machine to install my system so the problem might be with Time Machine. I just wiped my Mac and I’m trying to reinstall from Time Machine again.
But I didn’t do fresh install I guess. I just opened migration assistant. Hmmmm. Did I do it wrong?
If I do a fresh install, it will ask me to start like it’s a new computer. Should I go through those steps or just restart holding down COMMAND R and then do TM?
My question is this…I wiped my drive. I did a fresh install. It wants me to set up my computer with a new password and stuff.
After I do this, if I do time machine, I will have 2 profiles. How do I reinstall from TM without doing that. What part of TM should I put on my Mac? Understand?
Ok good news…it works fine after the fresh reinstall. I set up my profile and password and I’m ready to do migr assistant.
When checking my Ethernet speed, it seems to work fine now. So reinstalling time machine is the culprit. How should I proceed? Should I reinstall it section at a time?
Thanks
I would download-reinstall apps, then manually copy user data (jpegs, pngs, docs, docx’es, ppts, pptx’s, xls’, xlsx’s, pdfs etc.) from the backup. Once done, I would reformat the TM backup disk followed by a full, new backup. I would then disconnect that drive, label it “Recover” and store it in the basement. Then attach a new drive for regular backups.
The point is, your existing TM backup is spoilt goods, you need to treat it as such. Extract the known good, kill the bad & ugly. Avoid migration assistant as its a robo procedure that pulls in everything: the good, the bad, the ugly. Since we know there’s plenty ugly, MA is no-no.
I don't know if this will help you or not. But check the switches in your home. My house was wired directly for internet, and I had the same problem you did, my wifi was much faster than my wired connections.
The smart box had a 100 mbps switch, and that was causing the slow down. I replaced with a gigabit ethernet switch and that solved my problem.
If you are directly connecting to the Comcast router, they're probably lying to you. :) If you have a friend with faster ethernet, see if you can hook up there to check your machine.
See if the shorter 10' cable fixes it. If it does, you know the problem isn't the mini. If it doesn't, I would schedule Apple Service-Repair
I assume you are using an Apple USB-C to Ethernet adapter on the MBP ?
Turn off WiFi.
Check your DNS settings for Thunderbolt Ethernet.
How long is the cable? Anything in between? How are you measuring “super slow”?
It says 1000
Try fresh install. Then restore data from TM.
Sorry for being a bit rude in my last response. I’m just frustrated because of the work I’m losing out on.
Slow Ethernet speeds
