IMac keeps losing internet connection

Hi I have just bought an iMac. Unpacked, set up, and away I go.
Problem. Every 30 secs or so, the internet connection stops! Only on the iMac. I have an iPhone 4 and iPad 2 and they are both connected to the internet using the same WIFI in my house.
Is there a known problem here your help would be very appreciated.
Thanks.

Well... I found something that did work for me... and I have the wifi continously working for more than 48 h now.
(to be done as admin)
1. Turn Off wifi
2. Open terminal
3. Type "sudo open /Library/Keychains/System.Keychains"
4. Search and delete the network passwords
5. Close the window
6. Reboot the iMac
7. Turn on Wifi and put your passwords again for your network
Hope that helps for you too
Cheers

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My iMac keeps losing Internet connection over WiFi

I have read many, many threads on this topic, but have yet not found a solution.
Environment:
     iMac 10.7.3, ADSL Broadband, wireless modem/router
Symptoms are:
     Browsing fine on both laptop PC and iMac, suddenly iMac says it has cannot find a page.
     Network diagnostics has red dots in last two items (Internet failed and Server failed).
     Laptop PC (also wireless) keeps working fine - so the problem is probably not the modem/router.
I can immediately fix the problem by going to Menu bar, clicking WiFi symbol, clicking "Turn Wi-fi Off" and then clicking "Turn Wi-fi On". All green lights and all is OK, until next time.
Any more suggestions?
Barry

Barry,
Can you sample your environment? Connect to your WiFi network and open a terminal (Applications - Utilities). Copy and paste these two commands, one at a time and then paste the results to this thread.
/System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -I
/System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -s

IMac keeps losing internet connection, won't reconnect!!!!!!!!!!!!

Hello,
I use the wifi in my house to connect to the internet on my iMac. Every 2-3 days it just disconnects and there is an exclamation mark where the wifi bar is. It says there is no ip address and sometimes in half an hour wifi starts up again. Someone after a shut down etc it still doesn't reconnect for hours, it says no ip or if it does self assigned ip.
Network diagnostics doesn't help and it just says your network configuration has changed.
This isn't a os mountain lion issue as I have reset it, its not a problem with wifi connectivity in the house as when wifi is down on my mac it still works on my tv phone ipad etc.

Hi, this has worked for a few...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.7 & 10.8…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
10.4 instructions...
Is that Interface dragged to the top of Network>Show:>Network Port Configurations.
If using Wifi/Airport...
Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
For 10.5/10.6/10.7/10.8, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
Click OK.

IMac keeps losing network connection

My iMac keeps losing the connection to my AirPort very sporadically, but very often. I keep having to open Network Assistant, choose the AirPort and the network, and re-enter the password. I then get a message that my network connection appears to be working correctly, which it then is. This could happen several times in a few hours.
I have tried creating a new network, but it still happens. We have 6 other devices on this network and do not have a problem with those devices.
Any advice?

LB60 wrote:
What am I looking for in the window that pops up?
here's a (very crude) screen shot of an iStumbler scan on my MBP
my network is called pegasus. see that it broadcasts on channel 11 (2.4 GHz band) ? see also that there are six other networks broadcasting on the same channel ? now, ideally i would change my channel to broadcast on "5" or "6", but since there are so many networks around, even those would give me interference from other networks nearby.
in the end, i decided to hardwire (using ethernet cables) most of my devices to my router (time capsule) in order to avoid interference alltogether.
also, there could be closed (hidden) networks around that only KisMac would be able to pick up.
lastly, as the read about *wireless interference* revealed, there are other sources that could interfere with your network performance: microwave ovens, cordless phones - heck, even enabling bluetooth on your very own Mac could be a source.
as an alternative to running ethernet cables throughout your place, you could consider *powerline adapters* _*such as these*_.
JGG

My iMac keeps losing the connection to my chosen Airport Wi-Fi network. Anyone know why this happens?

My iMac keeps losing the connection to my chosen Airport Wi-Fi network. Anyone know why this happens?

Close all Apps and see if Activity Monitor shows any processes runnung.
Not that I think this is the cure but have you tried these resets:
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
The 5 second timing is important to a successful reset.
PRAM RESET
Zap the PRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

Do they have plans to fix the bugs with Yosemite. I keep losing internet connection on my Mac Book

Ever since i installed Yosemite on my Mac Book pro i keep losing internet connection. Should I go back to mavericks because I just hate this Yosemite or do they plan to fix the bugs soon? I did a complete clean install and I am still having problems. I see a lot of complicated solutions and I am not that tech savvy to go into my settings. Thanks

All software has bugs. The first release (which you have) will be the worst.
Many advocate not upgrading to a new operating system until it's been out for 3 months or longer. In the Windows world many recommend not upgrading until a full year has passed.
So yes, most / some bugs and glitches will get fixed over time. If you wish to reduce your difficulties in the future wait a while before installing ANY new OS.
I suggest you post specific details on your Internet problems. How are you connected etc.

I keep losing Internet connection on my ipad 4 can anyone help?

Can anyone help? I keep losing Internet connection on my ipad 4 especially when the battery is running down

Hello there, CrumbleWeed27.
The following Knowledge Base Article should help with troubleshooting WiFi on your iPad:
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/ts1398
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro D.

IMac keeps losing Wifi connection

Hello, I'm having an annoying problem where my iMac keeps losing its wifi connection. I've tried many things including messing around with the network preferences and trying an internet range extender. The only thing I can think of is that the distance from my router to my iMac has 4 walls in between, so maybe thats causing the wifi error. The only way to solve this is to disconnect and then reconnect back to the internet. This gets really annoying when I'm watching a video or trying to upload something. Thanks for your help.

Back up all data before making any changes.
Step 1
Take all the applicable steps in this support article.
Step 2
If you're running OS X 10.8.4 or later, run Wireless Diagnostics and take the remedial steps suggested in the summary that appears, if any. The program also generates a large file of information about your system, which would be used by Apple Engineering in case of a support incident. Don't post the contents here.
Step 3
If you're not using a wireless keyboard or trackpad, disable Bluetooth by selecting Turn Bluetooth Off from the menu with the Bluetooth icon. If you don't have that menu, open the Bluetooth preference pane in System Preferences and check the box marked Show Bluetooth in menu bar. Test. Continue if you find that Wi-Fi is faster with Bluetooth disabled.
From that same menu, select Open Bluetooth Preferences. If the box labeled Discoverable is checked, uncheck it. Click the Advanced button, and in the sheet that opens, uncheck the top three boxes, if any are checked. Click OK. Enable Bluetooth and test again.
If the application called "Bluetooth Setup Assistant" is running, quit it.
Step 4
This step will erase all your settings in the Network preference pane. Make a note of them before you begin, and recreate them afterwards. It may be helpful to take screenshots of the preference pane.
Triple-click the line below on this page to select it:
/Library/Preferences/SystemConfiguration
Right-click or control-click the highlighted line and select
Services ▹ Reveal
from the contextual menu.* A folder should open with an item named "SystemConfiguration" selected. Move the selected item to the Trash. You may be prompted for your administrator password.
*If you don't see the contextual menu item, copy the selected text to the Clipboard (command-C). In the Finder, select
Go ▹ Go to Folder...
from the menu bar, paste into the box that opens (command-V). You won't see what you pasted because a line break is included. Press return.
Reset the System Management Controller.
Step 5
Make a "Genius" appointment at an Apple Store, or go to another authorized service center.
Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional — ask if you need guidance.
If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
*An SSD doesn't need to be zeroed.

OS X 10.9.2 (13C1021) keeps losing internet connection

All devices on the same wifi are working but my iMac keeps losing connection, any suggestions? I have an older iMac and that one also works fine. Even when I "wire" the iMac, I still have the same issue. The lose connect typically happens periodically and when it does, I lose connect for several minutes before it returns.

Several things to try. First is I get the devices work OK, however reset the router and modem and then restart the iMac in Safe Mode and then restart normally and test.
If that does not work try the steps Apple explains in http://support.apple.com/kb/HT5606

I keep losing internet connection

I have an IMac and for some reason I keep losing connection to the internet. I am using the Airport Extreme as my router. The router seems to be fine. My PC does not have any problem staying connected to the internet. When I look at settings the it appears that I am connected to the Airprt extreme on my IMac but I have no internet. I have to shut down the Iport and then reconnect. Evertime I do I will have internet for 1 second to 2 minutes and then it will drop again. I can't figure this one out! Please help!!!!!!!!!!!!!!!!!!

I have been having the same problems. I have tried unplugging, plugging everything back in. Opening airport utilities etc... My younger computers have no problem connecting no matter what the situation is. I feel that I have to tell the IMac what to do vs finding the network on its own. It is extremely frustrating what is happening. I've had my IMac for less then 5 months I do not understand. Sorry I did not help you with your problem, but I needed to vent my same frustrations!!! Apple PLEASE help!

Sorry to ask a popular question but....I keep losing internet connection...

Afternoon,
I recently bought an iMac (about a month ago) - I am quite new to the Mac world and have posted a couple of questions previously. I am using Mac OS X version 10.7.2 - 2.5 GHz Intel Core i5 (although I'm sure you can see that from here?)
I have noticed that I lose internet connection frequently which hasn't particurly impressed me as I then browse Safari on my iphone without issues. I use Virgin broadband (20mb) although no one ever gets that much I know! ;-)
I am also on a wireless connection - yes I could plug an ethernet cable in but why should I be needing to? I'm a little annoyed as I've spent a lot of money on this computer which I do love dearly, however, I do understand that nothing is perfect and on the mega annoying side, my friends keep slating me saying "See? Told you Macs are crap...blah blah..."
This never happened when I did have a PC so why does this seem to happen with Macs?
The reason I bought a Mac was purely because it is a lovely machine, it is pretty and I did actually think that I'd be having pretty much null problems with one. I also am a bit of a photographer and the screen on this Mac is amazing and pretty awesome for editing my photos. My old Gateway laptop died of BIOS death and lasted a record breaking 6 years. Prior to that, I had another laptop which was crap and died after two years, then a PC before then which was unspeakably awful. Many friends of mine have macs that have been with them for 10 years minimum, this was why I decided to buy one, for longevity purposes!
Anyway, I am sorry to ramble on but, is there something that I can do about this persistent interruption of internet? Can I do something to configure my settings?
Would really appreciate thoughts, views and some help of course. ;-)
Thanks very much
Pandora

Sometimes it's an interference issue related to all the items that use 2.4Ghz frequency.
Quote from attached article:
If you experience less-than-optimal performance on your wireless network due to interference from other wireless devices, you may be able to reduce the effect of interference by changing to a different channel on your wireless network. Less-than-optimal performance may be characterized by low signal strength in the AirPort menu bar, slow connection to the Internet, or slow file transfers between wireless computers. Simply reset the AirPort base station and it will attempt to use the 2.4 and 5GHz channels with the least interference when it starts up.
http://support.apple.com/kb/HT1365
Also in your router, use WPA2 security. WEP doesn't work well with new Macs.
Regards,
Captfred

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IMac keeps losing internet connection

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