Intel Mac :: Stopped Recognizing Ethernet Connection?
May 10, 2012
Airport is working fine, but the network port is having a problem. I have rebooted everything several times (cable modem, computer, wireless modem). I even reset the PRAM. Nothing works. I called Time Warner. After trying some things, they said there is something wrong with my MAC. I will probably take it into the Apple store, but I thought I would try this chat area first.
Info:
iMac, Mac OS X (10.6.8)
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Feb 22, 2012
I had no trouble getting on line until last week when a message came on that
IP address 192.168.0.139
was in use by
04:0c:ce:54:c1:e5
DHCP Server 192.168.0.1
Since that time, no matter if I plug it into one router or the other (I use a router in my office to share the one ethernet cable that comes down the hall) it claims that the ethernet is working and it knows that it is connected to the Internet,but it cannot access the Internet. IT seems to be stuck in a cycle of navel-gazing, constantly focused on its own ethernet IP address.
All I know how to do is operate the thing; we have no IT person here. A visitor set up our network for us a few years ago. Only the iMac has this problem; my PC laptops go online just fine. But all my work is on the iMac.
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May 2, 2008
The ethernet connection has stopped working on my MacBook. It has worked previously but now says no cable is installed. I have looked at the port and no damage is noted. I tried a known good cable from another system to no avail
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May 4, 2012
I have an iMac 27 inches, all was working fine, however, since this AM the ethernet port is not working thus I am unable to go online. I know a heavy thunderstorm happened last night. The machine is working perfect I can go on line ONLY via wifi.
I did check cables with another computer, and modem is working fine.
Info:
iMac, Mac OS X (10.7.3)
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May 30, 2012
2009 iMac running Snow Leopard.
NO issues until this morning. Put computer to sleep and it would not boot back up properly (stuck on Apple boot screen and it FINALLY came on after many tries). Now my wifi or ethernet won't actually "connect" to the internet. It says connected under network preferences and it's green, but I have no internet connection...
Info:
iMac, Mac OS X (10.6.8)
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Jun 3, 2012
Iimac uses airport extreme. For no known reason stopped connection to Internet. Reset. Still no connection with saying cannot connect because it timed out. When I connect extreme directly to the iMac I can get Internet. If I disconnect Internet does not work
Info:
iMac, Mac OS X (10.7.4)
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May 3, 2010
It went from having 4Gb yesterday (or the last time I checked it anyway) down to 2Gb. I'm using a Macbook Pro Unibody bought in July 2009. System Profiler says that it only has RAM in one slot. What's going on and how can I sort it? After Effects is also saying that it can't multi-process - I was able to previously so I'm confused on that too.
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Aug 4, 2010
I was playing Starcraft 2 on my MBA and the computer just shut down all of a sudden. Then when I booted back up the USB mouse I had plugged in doesnt work. I've since restarted and plugged in various things and it still doesn't work.
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Apr 4, 2012
I bought a Mini just a couple weeks ago and a LaCie 2big Thunderbolt drive. It's been working flawlessly, but today it doesn't recognize the drive and doesn't recognize even having Thunderbolt support and I can find nothing on Lacie's site or Apple's regarding this issue.
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May 16, 2012
I do not know why the notebook stopped recognizing the external mouse.
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Jun 9, 2012
My computer stopped recognizing my administrator's name and password. I can log onto my computer but I can't update any software.
Info:
MacBook Pro, Mac OS X (10.5.8)
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Jun 27, 2012
I purchased a Mac Mini about 2 months ago and was making DVD backups with a Samsung SE-S084D external drive. The first ones went OK, but now the system suddenly stopped recognizing blank DVDs... the drive reads all other discs unless the ones that are blank. It keeps saying The disk you inserted was not readable by this computer.
Info:
Mac mini, Mac OS X (10.7.4)
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Feb 9, 2007
eMac stopped recognizing the Airport Extreme Card. I tried restarting, resetting PRAM and the PMU, and pulling the card in and out. Is there anything else I can try?
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Feb 28, 2012
MacBook Pro 10.6.8 not recognizing usb camera connection any more. Worked fine for ever. Just stopped seeing usb connection to camera. Other usb devices show up. How do I get it to recognize camera?
Info:
MacBook Pro, Mac OS X (10.6.8)
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Apr 16, 2010
I've been having an annoying problem lately. The ethernet port on my Mac Mini seems to have stopped working. It happened when I was switching routers. Most likely I just unplugged it from the old router, and into the new one. After that, no more connection, nothing changes when I plug something in.
As far as troubleshooting goes, I've plugged it into other ports, and into my MacBook Air (Just to get a Self assigned IP) and nothing works. I know these ports work with my other computers. I've reset the SMC and PRAM.It works in bootcamp so this makes me think it's not hardware. Any other suggestions?
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Feb 10, 2009
I usually use an ethernet cable to connect to the internet. I recently bought a time capsule and in trying to set it up i plugged the capsule into the ethernet jack and my ethernet cable stopped working. I connected my computer into the capsule and its not the cable thats broken. I'm currently lost on what to try next, when i connect my computer to the jack, it says "nothing is plugged in" or something like that.
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Jun 14, 2009
I used the MacRumors Buyer's Guide for several months to find the best time to buy a MacBook. I'd never had a Mac before and found it to be so valuable. I hope someone in the forum can be as helpful as the site has been.
Yesterday I bought a new MacBook Pro 13" and as a store option the RAM was doubled to 4GB. Everything has worked well so far, in both OS X and Windows XP through Boot Camp, except for either OS accessing the LAN cable on my home ADSL. Both my portable modem (EMobile network in Japan) and the wireless seem to work with no issue, and both OS will recognize the ethernet port. I'm concerned that perhaps the ethernet adapter was modified when the store installed the memory.
I can remove the ethernet cable from one computer (where it works without any settings changes on my Windows notebook) and plug the same cable into the MacBook and it will not be recognized. The Mac OS error is that no cable is inserted.
However, as it's my first Mac, I didn't know if perhaps some new settings are required to make things work smoothly. Is there any DNS settings etc. that must be set for it to connect? Also is there some kind of connection diagnostic that will specify the location of the error in the machine? I'd like to exhaust any option before shipping this back to the store to be repaired or replaced.
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Nov 23, 2009
I am sure this may have been asked before , but I am having a problem finding an answer. I have an iMac (2008) and my wife has a ACER E500 PC (No WiFi connection), running Windows XP Media Edition. The only internet connection we have is to my iMac, so as both my iMac and my wifes PC both have Ethernet connections , I am trying to share my iMac internet connection to my wifes PC via an Ethernet cable, I am having no luck in getting it working.
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Jan 21, 2010
I have a Mac/Windows home network with two airport extreme base stations. One is connected to my dsl modem. The other is used wirelessly to extend the network, and I have a Xerox Phaser 5500 connected to one of its lan ports. Until recently, all computers, connected wirelessly could share the internet connection and print to the Phaser. Due to a power failure, I had to reset both the Airport base stations. I can still connect to the internet, however I can not print from any of the computers.
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Oct 18, 2010
"the AirPort Disk became available. what do you want to do?"
I typed my network and password.
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Dec 27, 2010
ive successfully done this before with 10.5 and xp and am trying to replicate with 10.6 and win7.
my imac connects to internet via airport. i want to share that internet with a win7 box via ethernet cable. i've turned on internet sharing in sys prefs but to no avail.
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Jul 27, 2008
i have my mac pro using one ethernet port for net connection can i put a sec cable in the other port connect it to my macbook pro and share the connection?
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Apr 21, 2010
I'm trying to setup internet sharing on a 24" intel imac running the latest 10.6.
We are trying to share an ethernet connection over airport, however I cant seem to get airport to appear in the 'to computers using' list.
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May 11, 2010
Got my iMac back in the end of February and it's been working flawlessly. About a month ago though, my connection started randomly dropping after periods of moderate internet-use. Say maybe, 20-30mins of browsing. It usually starts working fine after I shut the computer off for a while and try again. I thought maybe it was the ethernet cable, so I got another one, but with the same result. So it got me thinking, maybe it is my ISP. Called Verizon up and they said everything looked good on their end and that my IP was showing up fine. They reset my connection, but with no result. The gentleman on the phone suggested it maybe the computer.
I took my Dell laptop and tried surfing using the built-in Wifi for a while. 2 hours later...working fine. So I tried pluging the ethernet cable to the laptop, worked fine again. So now i'm thinking it HAS to be the computer. So switched the built-in Airport Wifi on the iMac on and tried it out. 2 1/2 hours later...everything works great. WHAT THE HELL!? I'm thinking, since it just suddenly happened, the problem must've been triggered by some sort of update I did(which I don't remember if I did). I searched the Apple Support forums and it turns out, several people have had the same/similar problem with their Macs with no solution.............
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Feb 3, 2012
I tried to connect my new MacBook Air to an ethernet network via the supplied usb to ethernet adaptor.Nothingn happened, and 'ethernet' did not appear in the system prefs/network window.I tested the connection on another machine and it works fine.I tried both the usb ports on the Air.
Info:MacBook Air, Mac OS X (10.7.2)
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Mar 22, 2012
I installed windows 7 on my mac mini and installed all drivers. after 2 days I decided to enable WOL but I faced a very slow file transfer over my network.
Info:Windows 7
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Apr 7, 2012
I've bought mac mini 2011 with lion and last upgrade system but i have very slow connection with internet via ethernet than my pc.
Info:
Mac mini, Mac OS X (10.7.3)
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Apr 21, 2012
I installed windows 7 on my mac mini and installed all drivers. after 2 days I decided to enable WOL but I faced a very slow file transfer over my network.I disabled WOL but currently I face random slow connection on file transfer, slow as as 50 Kb file transfer.
Info:
Windows 7
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Jun 12, 2012
I have here a mac mini 4,1 that keeps losing it's Ethernet connection. If the mac is shutdown and restarted there is no connection, however, if the mac is shutdown, all the cables pulled from the back and replaced then restarted it boots and the connection is back. It was reporting a very strange mac address starting with 00 which I've never seen before and I also had difficulty connecting to it via ARD as it would show in the scanner but not connect unless specifically connected via IP address. At first I thought it might be a system upgrade as it happen when we upgraded to 10.6.8 since then I've wiped it and installed 10.6.3 and still no luck.
Info:
Mac OS X (10.4.11)
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Sep 20, 2010
So I have just moved into a new flat in the centre of Sheffield UK. We are in the process of sorting out the best internet connection possible and it seems to be the pre wired connections that are in the bedrooms which are at 50Mb/sec... great. BUT! We want to share this wirelessly and as the only connection is via this walled socket (See attached photo) I don't know how to do it. It is not a standard BT wall socket but instead is something that an rj45 cable can plug into. Currently I have set up a wireless network by putting an rj45 cable from the wall directly into my mac mini and have set up internet sharing however this means that if I wanted to move or turn off my computer the wireless network would be lost! I have tried already connecting a current wireless router that I have (a Zyxel p-661hw-d1) but there is no dsl connection and therefore no internet. Would I need a wireless bridge? Just so you know the ISP is called Ask4, google it and you get to the homepage.
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