Well as he said, "I know it defeats the purpose of an 802.11n router, but it's a temporary fix until Apple releases an update or something."
It will stop any of them using 802.11n which is pretty rubbish anyway over 2.4GHz
I still say buying a new router that supported 5GHZ sorted my problems out instantly and I've had a much better wifi signal generally since then. I think the only things in the house that still have to use 2.4 are the xbox360 and the Wii U. All the phones and laptops now support the 5GHz bands.
This worked for me.
Since I install the new Mavericks 10.9.1 I got problem again.
Deleting the .plist files was fine and the connecting came back.Re: MacBook Pro constantly losing wireless connectivity
Delete the all those .plist file inside the system configuration folder than restart will fix it
For safety reason make a back up copy on your desktop before doing that
Library > Preferences > SystemConfiguration
I just wanted to help by outlining how i repaired the wifi issues that plagued my MacBook Pro 15" Unibody Early 2011 (Released February 2011 2.2 GHz Quad-core Intel Core i7 Processor, thunderbolt, Broadcom BCM94331PCIEBT4AX wifi/bluetooth card)
After a while of use, the wireless internet dies. The signal strength indicator fan in the top right corner still indicates five full bars. Right Clicking on the icon and clicking on "Turn wi-fi off" makes the fan icon go blank as it should, but the previously connected to network remains in the list check marked, which it shouldnt. All other wifi networks in the area disappear from the list. The status at the top of the drop down box says "Wi-Fi: looking for networks".
Right clicking on the icon and clicking on "Turn wifi-off" makes the icon go blank, as it should. Right-clicking on the icon and clicking on "Turn Wifi-On" does not enable the wifi. The fan icon stays blank, which it shouldnt. The previously "connected to" network remains checkmarked, but there is no connection to the internet.
Putting the laptop to sleep with the lid and waking it again results in five faded bars, but now no wifi networks can be found, and there is no connection to the internet. The issue occured round once a day at the beginning. By saving my work and rebooting the laptop, the issue has been manageable. However, it became unmanagable when it occured more and more often to the point where I had to save my work reboot my laptop every 1-2 hours of use.
What I tried to do to repair the issue
- Reboot the laptop. A temporary solution is to reboot the laptop, in which the wifi performs as it should until the issue occurs again.
- Use a USB dongle. A semi permanent solution was for me to buy a Ralink usb wifi adapter, that worked fine but was not ideal. It felt a bit rediculous and cumbersome to have to use a $10 usb adapter to repair a Macbook Pro that cost $2000.
- Connect to a different wifi network. This did not work. The issue occurs when connected to other wifi networks, such as my parents one at home. This hinted that it was not a wireless router issue.
- Reset PRAM, NRAM, SMC etc. This was only a temporary solution, as was just simply rebooting the laptop.
- Deleting my Airport settings files (plist files). Again, this was only a remporary solution, bus so was simply rebooting.
- Wiped the harddrive and installed Mountain Lion. The issue remained, even with a clean installation with no restoration of my old settings from TimeMachine. The issue was the same when I installed Lion, and Mavericks. I even noticed the same issue once with the wifi when I booted off just the OSX installation disk. As such, I believed that the the issue is hardware related.
- Visual inspection of the hardware. I took off the bottom cover of the laptop to see if there are any visually obvious loose connections, but there are none.
- Took the laptop to an Authorised Apple Repair Center. They did nothing. As it was an intermittent issue, they said that the wifi was working fine when they ran their DVD of hardware tests. As far as I know, they dont do any long-term tests, even though I had requested them to do so. They blamed the wireless router (which I knew was not an issue, see above) and mu wifi settings (which I also knew was not an issue, see above).
- Replaced the wifi card. This did not work. I bought a new Broadcom BCM94331PCIEBT4AX for around $35 off ebay. Following a guide on ifixit,http://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Unibody+Early+2011+AirPort-Bluet ooth+Cable+Replacement/5887 I replaced the card easily enough. It was just around 10 screws in total, easily managable in an hour if you take your time. Unfortunately, the issue returned again after a few hours of use.
- Replaced the motherboard, and the screen, which I assume means that the wifi antennas got replaced. This did not work. On an unrelated issue with the graphics card, Apple agreed to replace the motherboard, lvds, and LCD screen out of warranty (really good of them). Unfortunately, their authorised repair center took nearly 6 months to do the repair (again, they were a bad repersentation of Apple). Unfortunately, the wifi issue returned once again after a few hours of work.
What repaired it in the end
Finally, in a last ditch attempt, and as it seemed to be the only part in the laptop not replaced (including software), I bought a replacement wifi/bluetooth cable off ebay for around $30. This worked! It has been going strong now for nearly three weeks with no drop in wifi. It was pretty expensive for a simple black ribbon cable but I am glad that it worked. There was no visual damage to the old cable, but I suspect myself that the bottom cover may have pinched the cable against some edge near the motherboard, thus causing the intermittent drop-off in wifi.
If needed, I have a slightly more detailed repair outlined on my blog here, with iamges.
TL:DR: Issue with intermittent wifi on Mavericks Macbook Pro. Repaired it by replacing the black ribbon cable between the wifi/bluetooth card and the motherboard.
Thanks for that detailed explanation. My mid-2010 has the same issue, and I tried everything you did plus some other things, none of which worked for more than a couple days. I considered changing the wifi card and cable, but haven't done so yet. What I didn't understand, and still don't, is how this seemingly happened to my machine out of the blue. I think I'll give the cable a shot. I've been using a cheap USB dongle which works really well, but it bothers me to have to.
If the internet is cutting off, and you are getting the same strange behaviour with the Airport fan icon, I would say that there is a good chance that it is your cable. The reason that it happened out of the blue? I suspect that the ribbon cable is getting pinched somwhere against the bottom cover of the macbook. The daily wear and tair and bumps that it gets on the underside probably resulted in the cable getting damaged in this way. I am meaning to investigate this further when I get the chance by checking the space given to the cable between the bottom cover and the motherboard/case.
Funnily enough, I also had an old white macbook that also had similiar wifi issues. It turned out that a particular batch of the atheros wifi cards had driver issues with snow leopard and above.The solution was to downgrade the .kext file to that of leopard. Unfortunately, the older driver was not compatiable with some of the later issues of OSX and was one of the reasons that I sold the macbook. As far as I know, the issue was pretty well confirmed on the forums but there was no official fix.
Thanks for the info, BananaMacintosh. I truly hope your cable-replacement idea finds success for some people, but at this point (how many years have we been mucking around with this issue? at least two, personally), I can almost guarantee it will not be a universal fix for everyone.
I am among several other posters on this forum who experience NO wi-fi problems whatsoever when using their MacBooks in Windows mode (i.e., booting up into a Bootcamp partition running Windows). I don't think that would make sense if a cable were the culprit, since one would presume that the wi-fi behavior in both OSs would be equally affected.
Thanks for taking the time to put out some very detailed info, though. As I said, I hope it does the trick for at least a few people.
Interestingly my wifi connectivity seems to have stabilised.
Whilst I was trying to get my Seagate Central external HDD to work with Time Capsule, it involved playing around with my dlink router settings at the same time, but I received an error message that another device had the same IP address as my Mac.
At the same time, I took the time to update the firmware for my router as I didn't realise mine was a year out of date.
After that, I turned every wireless device off, turned the router off and turned it back on and then one by one turned each wireless device wifi back on so the router could reassign an IP address.
One thing I forgot to turn back on was the Seagate Central external HDD and I only realised when I received an error that I hadn't backed up for a while. But then I also realised that I hadn't had any wifi dropouts either.
I've restarted the Seagate Central - It's taken about three days to start the backup process again as it couldn't find the time capsule backup drive - maybe there have been bandwidth issues backing up over wifi whilst streaming season 1 of Breaking Bad to my Apple TV!
Anyway, so far I haven't had any more wifi drop-outs.
My wifi USB dongle from Amazon arrived today so that will be my backup if wifi drops out again.
As strangely as my WiFi stop last Spring and a restarted in August and has been solid since (while I try to ignore the situation as not to jinx it and I count my blessings), it just stopped again the other day. Now it comes and goes, visually in icons and control panels, but mostly the Menu Bar Icon says one ting and the Control Panel says another. But as a whole does not work. And this is no matter what partition with 10.6, 10.7, 10.8 or 10.9 that I boot to, the WiFi acts the same across the board. I'm in the proces of swapping out routers to see if's not a finicky hardware issue. I'm running a Netgear R6300v1 that is said to have "issues" that all during the warranty when I was talking directly to Netgear, they never said anything. And users are saying that after about a year they start to "die off". And mine Well in a reply to my review on Newegg, it was openly admitted in that reply and offer of help, that there are problems. So I'm going back to the last solid unit I had running DD-WRT firmware that makes most all units it's on operate their best. Too bad they don't have a solid version for the 6300v1 yet. Also looking at the ASUS RT-68U, I think it is.
So back to hardwiring when I can and feeling like I have a 17" tumor. And things were going so well.
Well swapped out routers and the WiFi came back up for about the same amount of time that it does when it choses to with the other router. So since the whole house connected to the other one, I put it back and WiFi came back. I surfed for a while and just a few seconds ago the icon went gray, and I don't have an Internet connection. Got to go reenable the Ethernet. OK Ethernet is on now and the CP and the icon both agree for once and says that WiFi is On, but not connected. Option-click on the icon showed networks and, Hold On, it's trying to come back up and I got the Wireless Diagnostics pop up, then the networks disappeared, but it still says it's on and is looking for a network. I have four, and there are many in my area. We're all on different channels and I use 5GHz and most others only use 2.4. This go around it comes back on for a short time when I wake it. The amount of time varies dynamically. Hup, the CP and Icon are not saying the same thing. CP says off, Option-Click Icon says On.
One thing I have noticed, is that if I plug in the Ethernet cable, sometimes the WiFi comes back kinda like a little child that see another that has a shiny toy that it wants to play with too. I leave both on and just watch the icon to see what happens. It was swell for a while. But the swelling has gone down.