IMac WIFI problem - New Clue?

The saga continues. I have seen it all. "Its a DNS problem." "Its your PRAM." "No, its Lion." The Geniuses even swapped out my WIFI card. Nothing works. So today I was running the PING command continuously in a terminal window, while trying to get to a website via Safari. Ping has always worked, which is a big mystery, as none of the browsers work. So you think this would be related to HTTP or something like that. Anyhow, the browser is stuck, as usual. Occasionally a tiny bit of data gets through, and small portion of the website appears. This is all par for the course. Then, all of the sudden, my normal PING pattern goes "nuts." The time variable goes from normal rates to about 1700 ms, and I start getting "DUP!" errors on every packet. I did a search, and it turns out that these DUPs are "duplicate responses." That is to say, I am getting more than one response back from the host. This can be caused by faulty hardware, improper network configurations, etc.
No answer here folks. But this is indeed bazaar behavior. Perhaps someone who knows what they're doing can make use of this. Here is a screenshot of the PING:

Problem SOLVED.
But, it took the purchase and installation of a new Airport Extreme (http://www.apple.com/airportextreme/).
It appears that Lion is simply not compatible with my eight-year-old Airport Express (and, judging from previous posts, numerous other wireless routers). Whatever Apple has built-into (or left out-of) Lion's programming is a major faux pas, indeed, rendering gazillions of wireless routers obsolete.
On the "plus" side, the speed and performance of Airport Extreme is awesome. My network is comprised of my new iMac, my wife's old iMac G4, our two iPhones, an HP 6500A Plus wireless printer and TiVo Premiere. All are now performing fast and flawlessly.
But this Apple WiFi boondoggle should really be a business school "case study".

Similar Messages

New iMac Wifi Problem!

Sometime the wi-fi connection freezes and internet doesn't work in the new iMac 21".
How do I fix this?
Thank you!

Thanks, but I have no problems with the wireless network. My MacbookPro, iPhone works perfectly with my wireless network and I live in my house without the neighbors. But the Internet to a new iMac freezes sometimes (especially after sleep) and I have to reboot the iMac. My iMac has been updated.

IMac wifi problems

My apologies for the duplicate, but would be great if someone could help me with this (was originally posted in Mountain Lion forum):
Hi,
Got an interesting problem here...my home network is powered by 2 Airport Extremes and I have a few Macs and numerous iDevices. Connection is dsl and not the best in the world meaning I get short timeouts from time to time where I lose internet and it will come back after a minute or two. My problem is with my iMac (all latest updates) if I lose internet it will not reconnect unless I off my wifi and then turn it back on. I can hold my iPhone and confirm internet is back to working after a minute of losing it but even after an hour my iMac will not reconnect unless I do the off/on thing...
Also something interesting...this happened today while I was working on my computer and I received a popup saying I had lost connection to the hard drive plugged into my Airport Extreme (I did lose dsl for about a minute during this time). So on my iMac it's like the internet and my network go hand in hand when they really shouldn't right? Even without my dsl feed coming through for a minute or two it should not disrupt my home network right? And note...during these times I do not lose signal to my Airport Extreme according to the radar icon on my iMac it's always steady black...
Hope I explained this right any help would be much appreciated,
rc

Did the problem start recently or been ongoing for a while?
How old is the iMac?
Did you just upgrade to 10.8.5?? I would do an SMC reset as there seems to be some people having wireless issues since then.
http://support.apple.com/kb/HT3964
Also something interesting...this happened today while I was working on my computer and I received a popup saying I had lost connection to the hard drive plugged into my Airport Extreme (I did lose dsl for about a minute during this time). So on my iMac it's like the internet and my network go hand in hand when they really shouldn't right?
It depends actually on how the setup is done.
If your AE is in bridge and the modem is the one doing router duties.. then it is possible the dsl drop out can have bad effect on the computer.. although it should pick up immediately after it.
Is it possible to swap over to ethernet and see if that has the same issue?
Look at Tesserax doco on wireless issues having to do with sleep and restart.. although yours is different I would still clean out all the old wireless settings and different networks and start over clean.
In fact I would factory reset the main AE that is router or bridge to the ADSL modem.. and start clean with wireless names.. all short, no spaces and pure alphanumeric. Short names can help a lot.
See the rest .. here.
https://discussions.apple.com/docs/DOC-3411
Try each step and see which is the solution.. if any.
I would also go back to 7.6.1 firmware as neither the latest two 7.6.3 or 7.6.4 help in any way IMHO.

Slow wireless speed with new iMac Intel- problem with 802.11g?

There IS a problem with the new Intel Mac, I have tried both the Intel iMac and the new Intel Mac mini and they both have the same problem with slow wireless speed (or rather it variates, if I do a ping to another computer on the network the speed goes from < 1 ms up to 1000 ms and then down to < 1 ms and so on). The older mac minis, my Linux boxes and my Windows PCs don´t have that problem. I have also read reports on the net and it appears that most users experiencing this problem have wireless card firmware version 101.3 (3.120.28.3) . A possible "fix" is to change to 802.11b on the router and then it works. No speed fluctuations and a stabile network! I know it is a bad solution, I would prefer to use 802.11g and get the speed. However I think this points to a problem with the drivers regarding 802.11g. I am starting up a new thread on this and those of you with problems, please try to switch to 802.11b and if it works let us make Apple aware of this.
/Tobbe

Which home hub do you have?
There is some general help at this link Wireless connection problems
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

Internet (wifi) on new 27" iMac is painfully slow!

Just got a new 27" iMac this weekend. The wifi seems to be painfully slow. I've looked through other forums and have reset the DNS to 8.8.8.8, which seems to have helped a little. It's just so disappointing to have this beautiful, new machine be sooo much slower than older computers. All suggestions welcome; thanks!

Not specific to a slow wifi connection, but wifi problems in general seem to crop up a lot on here and unfortunately there doesn't seem to be a 'one fix' solution.
However, sometimes any one of the following might help resolve issues although, unfortunately, not always. In no particular order:
Check wifi security - if it's WEP change it to WPA or WPA2 (preferably, as it's more secure)
Change the wifi channel on the router
Create a new Network Location: http://support.apple.com/kb/HT5289
Reboot the router
Also take a look at this link and the links within the article for other ideas. They mainly reference Lion, but still seem to be relevant to Mountain Lion:
http://osxdaily.com/2011/11/06/lion-wi-fi-problems-solution-mac/?utm_source=feed burner&utm_medium=feed&utm_campaign=Feed%3A+osxdaily+%28OS+X+Daily%29&utm_conte n t=FaceBook
...and this link:
http://osxdaily.com/2012/11/30/resolving-stubborn-wi-fi-connection-problems-in-m ac-os-x/

Strange wifi problem on a brand-new MacBook Pro

Hey there, I'm new here. Desperation has got the better of me, and I hope I can get some advice.
So, last sunday I bought a brand new 13" MacBookPro with 2.8g i7 processor and 10.7.2 OS (I can't update to 10.7.4 because System Update tells me the download has been tampered with or corrupted after I waited 2 hours for it to finish, but I'm trying a direct download from the website). Here's the exact product: http://www.amazon.com/Apple-MacBook-MD314LL-13-3-Inch-VERSION/dp/B005CWIZ4O/ref= sr_1_5?ie=UTF8&qid=1340301247&sr=8-5&keywords=macbook+pro+13
Everything is all perfect except for a strange wifi problem. Note that the wifi does not turn-on or off, it doesn't disconnect after 'sleep', it doesn't get less speed, it doesn't constantly leave a preferred connection (once I chose my home wifi it always connects to it no problem). The wifi bar is always full. What is wrong is that the internet is kinda 'glitchy'. The best metaphor I can think of is that it's like a car that has to be pushed down the road before the engine can start. Please, bear with me because this is kinda hard to explain and I'm not good at tech lingos.
One of the symptoms is browsing can get really slow and inconsistent, almost as if the wifi gets turned off in the middle of browsing. For example: if I look something up on Google and then open 5 new tabs, probably only 2 or 3 of those tabs will eventually load while the other two will not get past the long 'http:.......google.....etc etc' address and will eventually show one of those 'error loading page because there's no Internet connection' notice. This happens a lot. Sometimes I have to refresh/retry loading a page a couple of times before it finally loads, then usually everything will get back to normal and I will be able to open multiple tabs with no problem, but in a couple of minutes I would try to open another site and the problem will start again.
So I tried to see how it does with downloading using iGetter. Fortunately I also have a Macbook (white-plastic casing one) and my brother has an old 2006 MacbookPro so I can compare. With those two older Apples iGetter starts receiving data in less than 8 seconds after I click Start, while my brand-new Macbook Pro can take up to 15-20 seconds, sometimes it doesn't even start at all and I have to re-click the start button. But once the download actually starts (on my new MacBook Pro), it downloads like normal, it doesn't stop and the speed is also as good as I can get. Strange huh? Hence, like a car that has to be pushed before the engine starts.
I also tried 'speed testing' from a website with all 3 laptops. On my old MacBook and my brother's MacBook pro, once I click 'begin test' it takes only a couple of seconds of 'ping' before the download/upload speed measurements start, but with my new MacBook Pro (just like with iGetter) it takes up to almost a minute before the measurements start, sometimes it won't start at all and I have to re-start the test.
Well, thanks for reading. And hope you can help me shed some light into this. Because it is really preventing me from really enjoying my new MacBook Pro. And if this is most likely a hardware problem, I'd better get back to the store and try to get it replace or something while it's only been 5 days. *cheers*

Hey guys.. Thanks for the replies. Unfortunately, I bought the MacBook in Indonesia where there are no such thing as an AppleCare. The only option is to leave the Apple product to one of the 'Authorized Apple care centre' and have whoever do whatever to it without guarantee of success. As for returning it and getting a brand new one, I also don't know if there is such a deal here, but that's actually a good idea, will try to go to the store tomorrow. Although, I'm worried that the problem might be with OSX Lion or something and getting a new one won't help.
mark75090, I've tried resetting the router when I first noticed te problem, didn't work though. I've checked my new MacBook's wi-fi (option+click wifi bar) and it says 'PHY Mode: 802.11g', so does my MacBook and the old MacBook Pro. I don't know what those mean though, and I don't know whether or not my router is an N., can you tell me more please.. I have tried with the other two turned off, and only the new MacBook using the wi-fi but the problem persists. I have also tried connecting directly to the router, but as I described, the problem is too subtle for me to notice the difference.
Also, if I create a brand new Wi-Fi connection in network preferences and connect to my router through the new Wi-Fi profile, the problem seems to be gone for an hour or so, then it always comes back though. I have also just finally installed 10.7.4, but it doesn't help either.

Wifi problems with new ipad

I'm trying to learn how to correct wifi problems with new iPad. It is the wifi only, 64GB model. I want to be able to use it at work, where we have a great wifi network. I can usually connect to our network with no problem, but after an hour or so my iPad loses the network. When I try to reconnect, I see that the network is showing full strength reception, but I get the error message from the iPad that I am "Unable to join" the network. My iPhone connects to the same network seamlessly, as do all of the other iPhones of my co-workers and the older generation iPads that some of our staff has.
At other locations, I typically have no problems (home, apple store, etc.) but I have had the same situation pop up at a coffee shop where I could see that there was a wifi network available, but I could not join it even though it was the shop's free wifi.
I have tried turning the iPad off, turning off wifi and turning it back on again, and forgetting the wifi network in question. I can't think of any other methods that are available to an end user to correct the problem.
I have already gone to the Apple store to swap out the unit, and the newer one is having the same symptoms.
Can anyone offer any advice here? This is quite frustrating.

No problem! Have a read at this most interesting article which has special significance as regards your models!
http://edition.cnn.com/2012/04/05/tech/gaming-gadgets/ipad-wi-fi-issues/index.ht ml
However, I attach an extract from another thread for your perusal. You can disregard any suggestions/links you have already explored -
created by Texas Mac Man in Using iPad - View the full discussion
Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
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
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/
 Cheers, Tom ;)

Is it possible to load my Adobe Illustrator/Photoshop CS2 on my wife's new iMac version 10.7?

Greetings All,
Is it possible to load my Adobe Illustrator/Photoshop CS2 on my wife's new iMac version 10.7? So far, no luck. Message says: "won't support programs for Power PC"
Apparently it's time to dole out a chunk of change and upgrade. Your advice, comments, suggestions are welcome.
Thanks,
George

George:
Always an excellent idea to have a backup somewhere. Make sure you purchase an external drive that is big enough that you can create a few partitions. That way you can have a partition for the "clone" and then maybe two more partitions: one for your files as a backup and one for your wife's. And you can move the external around between your computer and your wife's, as long as they are both Macs.
And for cloning, I suggest and recommend Carbon Copy Cloner:
http://www.bombich.com/

After using "migration assistant" from my old iMac to my new iMac, some tools stick while using Photoshop CS 6 Extended. My current operation system is 10.10 Yosemite. I was wondering if UN installing then RE installing CS 6 might solve the problem. If th

After using "migration assistant" from my old iMac to my new iMac, some tools stick while using Photoshop CS 6 Extended. My current operation system is 10.10 Yosemite. I was wondering if UN installing then RE installing CS 6 might solve the problem. If this is recommended, I would need complete instructions on doing this. I have there serial number for the product.

using migration assistant is problematic.
at this point yes, you should uninstall everything migrated, clean and then reinstall properly using the installation files.
cleaner: Use the CC Cleaner Tool to solve installation problems | CC, CS3-CS6
installation files:
Downloads available:
Suites and Programs: CC 2014 | CC | CS6 | CS5.5 | CS5 | CS4 | CS3
Acrobat: XI, X | 9,8 | 9 standard
Premiere Elements: 13 |12 | 11, 10 | 9, 8, 7
Photoshop Elements: 13 |12 | 11, 10 | 9,8,7
Lightroom: 5.7| 5 | 4 | 3
Captivate: 8 | 7 | 6 | 5
Contribute: CS5 | CS4, CS3
Download and installation help for Adobe links
Download and installation help for Prodesigntools links are listed on most linked pages. They are critical; especially steps 1, 2 and 3. If you click a link that does not have those steps listed, open a second window using the Lightroom 3 link to see those 'Important Instructions'.
window using the Lightroom 3 link to see those 'Important Instructions'.

HT4889 Hi. I`ve just started transferring from my old Imac to a new Macbook, using the WIFI. But I realize it will take days to get it done. Can I cancel the process, and start over again using the thunderbolt port? Without causing any trouble?

Hi. I`ve just started transferring from my old Imac to a new Macbook, using the WIFI. But I realize it will take days to get it done. Can I cancel the process, and start over again using the thunderbolt port? Without causing any trouble?

See Pondini's Setup New Mac guide for possible answers.

Problems with my iMac wifi

iMac wireless problems
Help! I have tried all sorts of things to get my wi-fi working properly on my 2007 iMac since upgrading to Lion. Nothing, however, has really worked and performance is very patchy and generally slow to non-existant! Reading the blogs I am one of many users with this problem. My iPad, iPhones, iPods and macbook air all work perfrectly with no issues at all so it is clearly not anything to do with my Virgin broadband or netgear router.
I cannot hard wire the iMac into the netgear router as that is in the front living room downstairs and the iMac is in the study on the first floor (directly above). I also have a time capsule which I use for back ups.
I wondered can I hardwire the iMac to the time capsule and use the time capsule to route traffic to the netgear router rather than use the wi-fi in my iMac? If so I have no idea how to set this up! Otherwise does anyone else have any good ideas?
Thanks Chris

iMac wireless problems
Help! I have tried all sorts of things to get my wi-fi working properly on my 2007 iMac since upgrading to Lion. Nothing, however, has really worked and performance is very patchy and generally slow to non-existant! Reading the blogs I am one of many users with this problem. My iPad, iPhones, iPods and macbook air all work perfrectly with no issues at all so it is clearly not anything to do with my Virgin broadband or netgear router.
I cannot hard wire the iMac into the netgear router as that is in the front living room downstairs and the iMac is in the study on the first floor (directly above). I also have a time capsule which I use for back ups.
I wondered can I hardwire the iMac to the time capsule and use the time capsule to route traffic to the netgear router rather than use the wi-fi in my iMac? If so I have no idea how to set this up! Otherwise does anyone else have any good ideas?
Thanks Chris

My fix for the wifi problem

My wifi on my new unibody MBP was acting up. At first, the connection was dropping out after sleep, then it was slowing down, much more so than my iMac on the same network. Then, the internet stopped working altogether. Meanwhile, my iMac wifi was woirking just fine. Diagnotics showed the MBP was connecting to the router, but the internet wouldn't connect.
I called Apple Care and they had me connect the internet cable directly to the MBP. As expected, the internet worked fine. Then to my surprise, after disconnecting the cable and running the AirPort diagnostic again, the wifi started working again! Hurray!
Hopefully this will help some of you suffering souls out there.

I found the solution after many many many attemps.
It's not a MBP problem, it's your wireless router.
1- Set your BEACON between 20 and 50. D-LINK router for example use 100 has default value. It's too long.
2- Change your channel. D-link default is 6. Use whatever channel. I use 10.
Hope you enjoy!

Possible Solution to Ongoing Wifi problems

FINALLY! After four days of the same problem, we got it resolved by disconnecting my imac, two airport expresses and turning off iphone. Turned all off for 15 minutes. Started turning things back on in this order. Modem, airport express #1, imac, reset a new wireless network (it worked), #2 airport express attached to stereo for wireless music streaming (it worked), did a hard reset on phone and logged into the new home network. I could be wrong, but deleting old wifi connections and old home wireless network and starting anew from factory settings did the trick!
Message was edited by: cduell

Your solution has worked for some people in the past, but unfortunately not everyone.

IMac wifi can't find my network but can find everyone else's.

My iMac continually can't always find my home network (mostly can't), it can see all the neighbours ones but not mine. My macbook, iPhone and apple tv have no issues and connect everytime so it's not the network.
Any ideas?
Thanks

Try 'creating a new location', if you haven't already. Also, a few other things to try in this list of suggestions:
Wifi problems seem to crop up a lot on here and unfortunately there doesn't seem to be a 'one fix' solution.
However, sometimes any one of the following can help although, unfortunately, not always. In no particular order:
Check wifi security - if it's WEP change it to WPA or WPA2 (preferably, as it's more secure)
Change the wifi channel on the router
Create a new Network Location: http://support.apple.com/kb/HT5289
Reboot the router
Also take a look at this link and the links within the article for other ideas. They mainly reference Lion, but still seem to be relevant to Mountain Lion:
http://osxdaily.com/2011/11/06/lion-wi-fi-problems-solution-mac/?utm_source=feed burner&utm_medium=feed&utm_campaign=Feed%3A+osxdaily+%28OS+X+Daily%29&utm_conte n t=FaceBook
...and this link:
http://osxdaily.com/2012/11/30/resolving-stubborn-wi-fi-connection-problems-in-m ac-os-x/

Mountain Lion WiFi Problems (recap)

Folks, wanted to recap this as I am finding the problem much more broad than my original post (here: https://discussions.apple.com/message/19123146#19123146). Here's my setup:
MacBook Air 13", Mid 2011
Mountain Lion
Wifi Problems, cannot connect to open wi-fi and Sprint hot spot.
CAN connect to Time Capsule (at least I could before I started futzing with my setup while on the road)
here's what I've done so far:
Reset SMC
Zapped PRAM
Reduced MTU to 1300
Set hotspot to 802.11g only
Set IPv6 to Local-link only
Set up a new user account, no connection there either
Repair disk
Repair disk permissions
Removed WiFi in networking control panel and re-add.
Remove the network from control panel AND remove keys from Keychain
What I have not done but will try later:
Reinstall ML
Disable WMM
Observations:
ML seems to think there is a connection to the wi-fi, but it can never get an IP address
Using a static IP on the network doesn't help the problem
My hotspot never really registers the MBA as a connection

Tell you what worked for me .. finally.
Had two Apple technicians on the case - over the phone. Have to say, those guys are awesome! - with patience of saints! But to the point! As there was nothing obviously wrong with operating system, they promised to call me back the following day but suggested talking to my Internet Service Provider about the router (D-Link router). The ISP remoted to my iMac and logged into router site and changed channel selection from automatic to manual. He chose channel 13, and suddenly my MBA connected and has been connecting smoothly ever since. The reasons I had problems was that there was over 10 available wi-fi networks in my flat, some of which showed as having stronger signal than my own. The ISP guy told me this, increasingly, becomes and issue, especially in blocks of flats - the ether is filled with wi-fi networks to the point of saturation. He also said, his choice of channel 13 was just a fluke and it might turn out I'd have to change it again.
So, although the problem is now solved, there still remains this one nagging question: Why did the wi-fi connectivity zonked right after Mountain Lion upgrade?

IMac WIFI problem - New Clue?

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