Mac keeps losing network connection

I upgraded my Mac mini over the weekend to Yosemite. Upgrade went fine / no issues. However since the upgrade the Mac can no longer retain it;s IP address. It simply drops off the network.
It does this whether it's on Ethernet or wifi. I've trashed the com.apple.wifi plist's and that made no change.
This Mac never had any such issues when running Lion or Mavericks, does anyone have any idea how to resolve?

This normally happens when your neighbor and you are using the same WiFi channel. Try changing the default channel in System Preferences -> Network.

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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

Keep losing network connection... I have to continually shut down then restart to get network connection.

We have 2 computers and Apple TV that will be connected to internet while my iPod loses its connection. It seems to happen after it goes to sleep for a while like a half hour or so, haven't actually timed how long. But I won't get iMessage notifications. As long as I am actively checking my gmail or texting or searching internet I don't lose connection, just after it sits for awhile.
New(2 months old), 32GB (still have 15GB available), iOS 7.1.2, I only have one wifi network connection setup on it and have "ask to join networks" set to off

How do I make IOS 6 keep wifi on when iPod is sleeping?

IPhoto 11 keeps losing network connection

Ever since OSX Lion and iPhoto 11, one annoyance is, when you first load iPhoto, everything is 100%. Perfect. Then you go on and work with something else and when you return to that iPhoto 11 space, click share, and all the network connections are grayed out. You cannot upload or eamil photos to anybody. The only way to reconnect is to quit iPhoto and start again. This is non-productive behavior. This is ridiculous. This defeats the whole purpose of having iPhoto.
Did I do something wrong? Did I overlook some kind of settings?
Is there anyone else out there who experience the same thing?
Is there any Apple staff or inside people here who knows what is the fix?
Please help.

No Apple developers here. Only users like yourself. Sounds like a damaged library. Try this: launch iPhoto with the Option key held down and create a new, test library. Import some photos and check to see if the same problem persists.
If it doesn't then try the following to fix your primary library: Apply the two fixes below in order as needed:
Fix #1
Launch iPhoto with the Command+Option keys held down and rebuild the library.
Since only one option can be run at a time start with Option #3, followed by #4 and then #1 as needed.
Fix #2
Using iPhoto Library Manager to Rebuild Your iPhoto Library
1 - download iPhoto Library Manager and launch.
2 - click on the Add Library button, navigate to your Home/Pictures folder and select your iPhoto Library folder.
3 - Now that the library is listed in the left hand pane of iPLM, click on your library and go to the File ➙ Rebuild Library menu option.
4 - In the next window name the new library and select the location you want it to be placed.
5 - Click on the Create button.
Note: This creates a new library based on the LIbraryData.xml file in the library and will recover Events, Albums, keywords, titles and comments. However, books, calendars, cards and slideshows will be lost. The original library will be left untouched for further attempts at fixing the problem or in case the rebuilt library is not satisfactory.
OT

Mac Mini keeps losing network connection

Hey,
I have a Mac Mini 1.1 running 10.6.8, which I use as a headless media server at home. It connects to my BT Infinity 3 router via ethernet cable, and the Wifi is disabled. I connect to it remotely via dns through dyn.com. Other products sharing the network include 2 iPhones, an MBP and a windows laptop.
The problem;
Every few days, the Mac Mini will dissapear from the network and cannot be reached either through the shared devices menu or through Remote Desktop. Only a hard reset of the Mac brings it back. Can anyone help me identify what's causing this problem?
Thanks,
Tim

This normally happens when your neighbor and you are using the same WiFi channel. Try changing the default channel in System Preferences -> Network.

Keep losing network connection, especially after waking from sleep, but...

For a while now, my G5 would have intermittent problems not finding the network after it has been asleep for a bit. I used to resolve this by resetting the router, or sometimes putting the Mac back to sleep and resetting the router.
Lately, I discovered another fix: wake up my MacBook. The MacBook wakes up, connects wirelessly, and sees the network, and shortly thereafter, the G5 sees it too.
I cannot interpret this. Why would it be that the G5 would fail to see the router until after the MacBook is awake (and sees the router)? I never could figure out which component was at fault before, and this further confuses me. I mean, it seems that it has to be the G5, since if another computer can see the net on the same network, it would rule out the router and the cable modem. Right?
So what do I do about the G5, then? Yesterday, it was getting to the point where every time I woke up the G5, it wouldn't find the network (until after I woke up the MacBook).

Hi, Brent:
I would not be too quick to start swapping things out (esp. expensive things!) without letting the discussion flow. I have never seen an answer that worked except updates and not all do... see below.
My Dual 2.5GHz G5 has been doing this on and off for years. It has been networked wirelessly since I got it and I am on my third router now for other reasons. I run two other Macs (G4 mini and early IMac/Intel) as well as two laptop PCs, all wireless. None of the other machines ever has this intermittent connectivity issue - just the G5. The symptom is a stalled browser (Safari or FireFox) with the wireless symbol almost always at four bars. Once in a while (like today), the bars will fade down to two for a while, but rarely. Absolutely the only temporary fix I have found successful is to switch airport on and off. Cure may hold for a while or it may not. Have noticed some apps using airport still seem to work (an old MacStumbler utility) even when Safari locks up. Thought it might be a Safari bug, but FireFox does the same thing.
IMHO, this is fundamentally related to a G5 software issue or interaction with the airport or network card. As I noted above, code evolution is a strong factor in my experience. My problems come and go tightly linked to software updates. It is usually a night-and-day change. I am at 10.4.11 on all Macs here; problem had not been around until I ran the last big update to 4.11. Interestingly, my daughter owns a very new iMac with Leopard and has seen the same type of behavior since Day One. I have also seen this problem mentioned about Leopard and iMacs in the lay press.
Wish I could offer a solution, but I am just waiting it out again.

The HP (USB connected) and Epson (wireless) printers keep losing their connection with my Mac mini. I have to physically disconnect the HP and then reconnect for the Mac to find it. Turning off the wireless Epson doesn't work. All software is updated.

My HP (USB connected) and Epson (wireless) printers keep losing their connection with my Mac mini. I have to physically disconnect the HP and then reconnect for the Mac to find it. Turning off the wireless Epson doesn't resolve anything. All software/drivers have been updated.

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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.

Randomly losing network connection over wireless

Shortly after installing the 10.4.5 software update, my G4 iBook with built-in Airport Extreme card has been losing connection with increasing frequency. Built-in Ethernet use is unaffected. I'm calling this problem thrash-and-drop.
1. When it's losing signal, processor activity goes through the roof. I had Activity Monitor running during a thrash-and-drop. kernel_task CPU consumption goes from under 1% before the event, to over 80% during the thrashing, and back under 1% after the thrashing stops. The activity is so bad the cursor can't be controlled: using the track pad sends the pointer all over the screen or nowhere at all.
2. This has been observed to occur with two different wireless base stations: A Linksys WRT54G and an older SMC 802.11b router. Either router is within 10 feet of the computer. Only one is running at a time. There are no other base stations in range.
3. Another iBook G4 (OS 10.3, Airport Extreme card (not built-in)), sitting next to it, shows no change and its wireless behavior is unaffected.
Initially, this seemed more likely to happen when Safari was loading Flash-heavy pages. And after thrashing and dropping a connection, it was able to reconnect after either a reboot or a five minute sleep. Currently, it can't connect to a base station for more than a minute. Most recently, it thrashed and dropped while I was selecting the base station to use. This is true regardless of the application running. In fact, it will thrash-and-drop when there are no user applications running at all, after a fresh reboot.
I've tried the following things to address the problem. None have affected the thrash-and-drop problem. Admittedly, most of this is random:
1. Back up and delete network preferences in /Library/Preferences/SystemConfiguration
2. Turn off IPv6 in System Preferences/Network
3. Back up and delete network preferences in ~/Library/Preferences (com.apple.NetInfoManager.plist and com.apple.NetworkUtility.plist)
Has anybody else seen this problem? I want to blame it on the 10.4.5 upgrade but I haven't seen anybody else complaining about 10.4.5 doing this to them. If there's something I can do to fix this in a software setting, I'd much prefer that to yet another roadtrip to the Apple store.
1.33 GHz G4 iBook Mac OS X (10.4.5)

Hi!
I have the same problem of randomly losing network connection over wireless, though mine is hardly related to surfing.
I have an external storage drive in which I use for backup of my stuff, and I access the drive via my modem, using the airport. Of late, I noticed that when copying files from my iBook to the external drive, the connection would suddenly drop before the transfer is completed. This began to occur with increasing frequency, particularly when transferring large files.
I have since abandoned wireless connection, and reverted to my trusty cable. Still, I admit that I'm really curious about the cause of the apparent lack of reliability with my wireless connection. Has it something to do with the airport?
1.33 GHz iBook G4 Mac OS X (10.4.5) New to Mac, just switched from Windows 4 months ago.

Can't re-order my queue on Netflix and keep losing the connection

I'm having so much trouble with Netflix! I can't re-order my queue, I keep losing the connection, and it's painfully slow. Is Netflix known to be unstable on iPad? Other internet connecitons seem to be fine.

I rarely have problems on it - I do occasionally have drops in video quality, but nothing consistent. It does require a very strong and stable network connection, and I also wonder if they have periodic "crush time" incidents on their end, considering the rapid growth of Netflix streaming.
Updating the queue is a pain on it - you can't do it on the app, and have to go to their website. I generally find it easier to do on a computer.

I have a Airport Extreme 802.11n and my T.V. is a panisonic,I keep losing the connection. Anybody have any answers?

I have a Airport Extreme 802.11n and my T.V. is a panisonic,I keep losing the connection. Anybody have any answers?

Plenty of suggestions.. only you can find out which one is correct.
What model AE? What firmware?
Since Panasonic TV is not apple it will use SMB windows type networking.. everything but Apple does.
Are the names in the AE all SMB compatible.. ie short.. max about 20 characters.. no spaces and pure alphanumeric.
Is the security set to WPA2 Personal with a pure alphanumeric password of 10-20 characters.. more is fine if you suffer paranoia but isn't needed.
Fix the wireless channels.. so it doesn't flip flop like a dying fish.
There are only 3 channels for 2.4ghz that do not overlap, 11, 6, 1 although someone suggested 8 works well if you have heaps of interference. If you live in flat/apartment building you have heaps of interference.
Lastly is it stable if the distance is 3M direct line of sight?
If not then get a high power wireless AP and use that instead.

TS1398 My ipad3 seems to have connection issues. It is wifi only but keeps losing the connection and is really slow in loading pages - a bit like dial-up speed! My iPhone 4s and daughters' ipad2 have no problems at all. Any ideas anyone?

My ipad3 seems to have connection issues. It is wifi only but keeps losing the connection and is really slow in loading pages - a bit like dial-up speed! My iPhone 4s and daughters' ipad2 have no problems at all. Any ideas anyone?

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

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.

TS1398 iPad 2 keeps losing wifi connection about every 3 minutes no matter where I am in my house. Very annoying. help?

iPad 2 keeps losing wifi connection about every 3 mins no matter where I am in the house - Help?

Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
Additional things to try.
Try this first. Turn Off your iPad. Then turn Off (disconnect power cord) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
Change the channel on your wireless router. Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
Another thing to try - Go into your router security settings and change from WEP to WPA with AES.
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
If none of the above suggestions work, look at this link.
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
 Cheers, Tom

Mac keeps losing network connection

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