OS X Mountain Lion WIFI Drop
I recently upgraded to Mountain Lion from Snow Leopard. I keep losing the wireless internet connection. I have tried several of the suggestions on line from creating your own network, to renewing etc. Any suggestions?
When does this occur? While you are using your iMac, or after it wakes from sleep?
How do you re-establish your wireless connection, after it is lost?
Similar Messages
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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 connectionTell 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? -
Macbook pro 15in 2011 with mountain lion installed- dropped wifi
I am having a fit with my macbook pro - dropped wifi after sleep- I did all the things suggested in another apple forum- my airport extreme is current with updates- renewed dhcp etc etc NOW to be accurate my 2010 mac mini has no issue whatsoever-- this is driving me crazy- I would have thought Apple would have fixed this by now -with the update 2 or 3 days ago but ha ha it did not-- but I can assure you that it is not a hardware issue as much as a mountain lion/ apple software issue- I have to restart my computer all the time to remain connected- can someone tell someone at apple about this- I sure am seeing a TON of people with the same problem- it is not allowing me to run smoothly-- as I had zero issues before the perfect install of mountian lion --from lion-- which my macbook came with-- I am also running Kaspersky for Mac and it is the 2013 version and today I had to restart change its proxy settings to get it to update and it was fine last week.
I am wondering if this has anything to do with the apps having to come thru the app store because a time and moon phase widget I got when running lion from the app store is just blank now. Safari loses the ability to connect and I have to restart then all is well for an undetermined amount of time or an awake from sleep mode and its thank you apple turning my laptop into a **** on earth- I thought I should put this out there for Apple to see.For anybody whomay stumble across this post- it is an addendum to the originalpost
Just to be sure it is an APPLE SOFTWARE ISSUE - ProbablySafari---I used my mac mini ( with mountain lion ) and-- it too drops wifi-- and the end result is
SAFARI CANNOT CONNECT TO SERVER lol
the app store hangs and hangs and hangs
as it does my macbook pro -- they BOTH have to be restarted-- then it is okay for a little while
THIS IS SO ANNOYING ha ha-- in this instance caps does mean I am yelling lol -
Ios 7 air drop not working with mountain lion air drop
Hi, didn't see an iOS 7 forum, so I'm posting it here since I was testing it out on my iPhone 5.
I tried to use air drop to share photos b/w my iPhone and my MBP running mountain lion, both has air drop enabled, but I couldn't see either on the air drop window.
is iOS 7 air drop not compatible with OSX air drop??
bluetooth and wifi are on for both machines.
thanksI have a Logitech Ultrathin Keyboard Folio i5. Also, even before reading your suggestions, I moved my phone hand set away from the iPad. There aren't any other sources within 10 feet although the phone base is within 30 feet. The WiFi router is about 5 feet away. Haven't had a chance to "troubleshoot" the connection.
Have you any suggestions for Air Drop or Air Print? My Pixma MP 450 which in excellent working order isn't compatable with either OS 10.9.x or iOS 7.
Canon suggested a Pixma MG 3520 which was hellatious to set up, requiring a big download and both a USB cable and Ethernet connection to the router, and isn't working with the iPad.
Clearly, technological "advancements" are for teeny boppers who spend their time taking phone pictures, sending mindless messages and listening to music. Oh, to be 14 again.
Sorry about the bitters. Rare opportunity to vent to adults. -
After installing Mountain Lion, WiFi problems
I installed Mountain Lion on my mac mini and have been having intermittent WiFi problems ever since. It seems to be getting worse, connection is now being dropped several times an hour as opposed to several times a day. I have tried all the suggestions that have been put forth with no luck. My iPhone can use the WiFi with no problems. What I have found that seems to work everytime is to go into the Network system preferences, turn WiFi off, and then immediately turn it back on. I am using the most recent Apple Airport Extreme. I urge Apple to fix this bug quickly.
Don't know what to tell you, but I also have an AEBS-Gen5 with a MBP Retina and Mac Mini using WiFi. Both are running Mountain Lion and I don't have any WiFi connection issues. Two iPhones in the household use WiFi with no issues along with a printer and 2 Windows 7 laptops.
First thing I would try is to shutdown all computers connected to the AEBS. Then power off the AEBS and finally the cable/DSL modem. Then reverse the order and power on the cable modem, wait for all the lights to be solid, power on the AEBS, wait for the light to show solid green; then power up a computer that uses WiFi.
If the above doesn't work, you might try repairing permissions via Disk Utility. If that doesn't help maybe a PRAM reset would work. -
Mountain Lion wifi problems?
Hi there, Not sure if this is the right post for this but I am running a 15" MBP Retina with Mountain Lion, all of my software is up-to-date.
This evening I was on my home wifi like normal, and my computer all of the sudden dropped the connection.Other wifi connections were still showing up in the dropdown and Both my wife and I's iphones were still connected to the home wifi. I figured the router needed to be reset so I did that, and no change.
I've tried manually "Join Other Network" and still nothing, I've cleared my preferred networks list and then re-added the home wifi to the list, still nothing. Ran a scan to make sure it wasn't a spyware bug or something like that, nothing. From what I understand this issue is pretty common with Lion and Mountain Lion.
Can anyone help? I'd prefer to not have to go in and change my router settings as that isn't really fixing the problem, it sounds like its in the Lion software, wondering if there are any other fixes to this problem?
Thank you in advance!Maybe these will help:
Troubleshooting Wi-Fi issues in OS X
Wireless Connection Problems - Fix -
Mountain Lion WiFi: Major Problem
I have a late 2011 17" MBP and did a clean install of 10.8. Ever since that time, I am unable to maintain a useable connection to certain access points. At first it seemed like the internet was slow, but eventually pages loaded and I didn't think too much of it. But then I started accessing lots of files on my home server (OS 10.6.8 Server) and the Finder was beachballing with nearly every click. I plugged in an ethernet cable and all the problems went away. Went back to wireless, the beach balls and sluggishness came back. Then I rebooted to my 10.6.8 partition and connected and used the network just fine on the wireless, as I had been for years before on this MacBook and my previous MBP.
After searching through forum posts I saw that some people were blaming this Mountain Lion bug on whatever runs the 5Ghz connections. So I forced my MBP to connect to the 2.4Ghz radio. While I did have one glitch (a video didn't play smooth over the network initially) it has basically been solid ever since. Yesterday I spent the day at a client where I run the network and my 5Ghz problems came back. I would have to power cycle the Airport to get the connection useable again. Both my home network and this client's are running with Ruckus Wireless ZoneFlex 7363 access points. At home I also have an Airport Extreme from a few years ago that I use as a router with wireless disabled. I turned that on and while I didn't really use it for all that long, it seemed to work at 5Ghz--but I didn't really use it that long and need to do more testing.
My exact setup:
1) Clean install of 10.8
2) Late 2011 MBP 17"
3) Ruckus Wireless ZoneFlex 7363 firmware 7.3.x
I hope this is fixed soon or someone discovers a workaround.+1 -- I'm basically in WiFi h*ll since upgrading. 10.8. Injected all sorts of issues on my network and devices where 10.7 was rock solid. Mid 2009 15" MBP dropping connections on Linksys E4200 at 5GHz. If I switch to 2.4 GHz, no issues. At home I have an Airport Extreme running 2.4 and 5Ghz. I am experiencing drops on 5GHz there as well. I upgraded to 10.8 instead of a clean install, but from reading the forums that doesn't work either. I have a Mac Mini that is wired and no problems.
A couple of other interesting pheneomenons since upgrading;
new model Airport Express:
I bought one the same day as upgrading to 10.8 and immediately encountered issues setting up the AP to extend the Airport Extreme network on 5GHz (kept returning "encountered unkown errror" when writing the configuraiton to the AP). I had to use the old 5.6 Airport Utility to get it to save and 2.4GHz to keep devices from losing their connections. Other weird thing is the 'Back to My Mac' icon on the Airport Express stays yellow where the Airport Extreme turns green.
new model Apple TV 3:
Flawless prior to upgrade day. Now, no longer works on either frequency. Started with dropping Home Sharing connections, then progressed to losing WiFi altogether. It won't even run on the ISP provided router at this point. If I do a reset or a full restore in iTunes, it works for about 5 minutes and then drops the connection and resets itself to the main screen with only a 'Settings' and 'Computers' icon.
I know, possilby conincidences and unrelated but curious issues for sure. I've pulled out each piece and tried to see where the problem returns but no luck. I have recommended and deployed a lot of Apple devices over the years and this is the first time I've ever had problems. One family member seems to be having a similar issue with a new Apple TV3, Airport Extreme and iMac on 10.8 combination. A little embarrassed for having made those recommendations now. The only thing that solves it for me is rolling back to 10.7 -
Mountain lion wifi is not working properly
After installing the Mountain Lion in my imac late 2011 model, 27", it started to show wifi errors. I tried to restart the system to see if the wifi connects back or not. It shows as connected but not possible to browse the net.
I then turned-off & turned-on the wifi alone and I found it got connected and was able to browse. Few minutes after the browsing the wifi connection went off and was not able to browse.
I repeated the same rectification method and was able to get back to the web browsing. Several times since mt. Lion is installed I experienced and it is now three days.
Any one experienced the same errors and found a permanent solution please share the method.
ThanksHello you all,
I also had the problem of a disconnecting wifi while my imac was sleeping. I did not have the reconnecting issue after sleep, but the lost connection issue during sleep which made it impossible to reach my imac for things like homesharing, apple tv or remote desktop. I have a late 2012 iMac with a clean ML 10.8.2 on it and wirelessly connected to an apple time capsule (same as an airport extreme). My partner has a mid 2007 iMac, also with an ML 10.8.2 on it.
I tried every single solution I could find on the internet, such as changing the router's security from wpa2 to wpa, changing the MTU from automatic to manual 1453, router reboots, re-installations, re-configurations, keychain clean-ups, everything.
Eventually I solved my problem with these steps and now it works as a charm. I can still find the iMac with the remote app, even after 12 hours of sleep:
My time capsule router is set on automatic MTU and encrypted with WPA2 and I use the 5Ghz network!
1. Cleaned all the wifi passwords in keychain on my iMac
2. Created a new network location in system preferences
3. In this location I deleted the bluetooth pan and bluetooth dun connection.
4. In this location I changed the preferred connection-order to wifi on #1 and ethernet on #2.
5. Restarted my iMac.
Now I still have a connection when it sleeps and I can wake it to low profile using the remote app (homesharing) and everything works fine.
Hope more people wille be helped by this. -
Mountain Lion wifi WEP security connection issues
After installing Mountain Lion I experienced connection issues with my linksys router when waking from sleep. After trying numerous recommended fixes that would only work for a short period of time I have come across a fix that resolved all issues.
1. Login to your router and changed from WEP to WAP security settings.
2. In network preferences>advanced; delete the previous WEP network from your preferred networks.
3. Open Keychain Access (spotlight search) and delete the Airport network password from both login and system.
4. Search for new wifi networks and select the new WAP connection to your router.
This has completely resolved my issue and forced my lazy self to upgrade from the outdated WEP secutiry protocol to WAP.
Hope this helps anybody experiencing this issue.I think you mean WPA, i.e. WPA2 (personal) for best security, compatibility and performance (or is Linksys different?)
http://support.apple.com/kb/HT4199?viewlocale=en_US -
Mountain lion wifi, mountain lion wifi
Soy usuario de Mountain Lion en un ordenador macbook recién comprado y la conexión inalámbrica (airport), falla constantemente. Es un problema que ya tuve con un macbook del 2006 con OSX Lion, al que decidí reinstalarle Snow Leopard.
¿cuándo saldrá una actualización que resuelva el problema de pérdidas de conexión inalámbrica?
Gracias.Creo que he corregido el problema.
El caso es que ni el Servicio Técnico de Apple, ni tampoco la compañía que me sirve internet, han conseguido solucionar el problema, pero hilando, hilando, hice lo siguiente y eliminé el problema:
- Entrar en la configuración del router-wifi/avanzado/Rate (o lo correspondiente).
- Normalmente, el ratio de descarga estará en auto, pero tenemos que limitarlo al máximo de Mb que tengamos contratados, ya que algunas compañías, al dedectar que hay más tráfico de datos del contratado, cortan la conexión. Por ej, si tienes contratados 5 Mb, pues pones el ratio en la cantidad máxima posible, para que no te sobrepase ese tope de ratio.
y ya está, problema solucionado. -
Ok. This is super frustrating. Its been three generations now since this wifi issue. I have mid 2010 MBP with broadcom drivers. The wifi wont pass traffic with cisco APs. The only fix is disable 11n rates then only it will connect. I had to downgrade the driver to 10.61 etc to fix that issue. Today i upgraded to mountain lion and surprise.... My wifi is pretty much useless... Pings to default gateway are pn an avg 4ms and good minutes of ping losses..
This is just not acceptable. This is stupid and lame and apple nees to fix this pronto..
Geez apple is making billions of revenue and freaking cannot fix a stupid driver issue... I want my money back... And above all give me my time back which i spent to tshoot this problem...This is on Mountain Lion drivers
Ping has started…
PING 192.168.0.1 (192.168.0.1): 56 data bytes
64 bytes from 192.168.0.1: icmp_seq=0 ttl=64 time=3.745 ms
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=4.297 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=3.810 ms
64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=3.777 ms
64 bytes from 192.168.0.1: icmp_seq=4 ttl=64 time=4.969 ms
64 bytes from 192.168.0.1: icmp_seq=5 ttl=64 time=3.756 ms
64 bytes from 192.168.0.1: icmp_seq=6 ttl=64 time=15.632 ms
64 bytes from 192.168.0.1: icmp_seq=7 ttl=64 time=1.284 ms
64 bytes from 192.168.0.1: icmp_seq=8 ttl=64 time=94.444 ms
64 bytes from 192.168.0.1: icmp_seq=9 ttl=64 time=48.521 ms
64 bytes from 192.168.0.1: icmp_seq=10 ttl=64 time=9.046 ms
64 bytes from 192.168.0.1: icmp_seq=11 ttl=64 time=1.527 ms
64 bytes from 192.168.0.1: icmp_seq=12 ttl=64 time=3.842 ms
64 bytes from 192.168.0.1: icmp_seq=13 ttl=64 time=2.336 ms
64 bytes from 192.168.0.1: icmp_seq=14 ttl=64 time=1.485 ms
64 bytes from 192.168.0.1: icmp_seq=15 ttl=64 time=1.183 ms
Request timeout for icmp_seq 16
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64 bytes from 192.168.0.1: icmp_seq=57 ttl=64 time=1.015 ms
64 bytes from 192.168.0.1: icmp_seq=58 ttl=64 time=1.297 ms
Interfaces:
en1:
Card Type: AirPort Extreme (0x14E4, 0x8D)
Firmware Version: Broadcom BCM43xx 1.0 (5.106.98.81.20)
this is after the downgrade
Ping has started…
PING 192.168.0.1 (192.168.0.1): 56 data bytes
64 bytes from 192.168.0.1: icmp_seq=0 ttl=64 time=1.348 ms
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=1.179 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=1.385 ms
64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=0.916 ms
64 bytes from 192.168.0.1: icmp_seq=4 ttl=64 time=0.937 ms
64 bytes from 192.168.0.1: icmp_seq=5 ttl=64 time=1.252 ms
64 bytes from 192.168.0.1: icmp_seq=6 ttl=64 time=1.024 ms
64 bytes from 192.168.0.1: icmp_seq=7 ttl=64 time=0.988 ms
64 bytes from 192.168.0.1: icmp_seq=8 ttl=64 time=0.960 ms
64 bytes from 192.168.0.1: icmp_seq=9 ttl=64 time=1.020 ms
64 bytes from 192.168.0.1: icmp_seq=10 ttl=64 time=1.706 ms
64 bytes from 192.168.0.1: icmp_seq=11 ttl=64 time=1.219 ms
64 bytes from 192.168.0.1: icmp_seq=12 ttl=64 time=0.980 ms
64 bytes from 192.168.0.1: icmp_seq=13 ttl=64 time=1.170 ms
64 bytes from 192.168.0.1: icmp_seq=14 ttl=64 time=1.144 ms
64 bytes from 192.168.0.1: icmp_seq=15 ttl=64 time=1.470 ms
64 bytes from 192.168.0.1: icmp_seq=16 ttl=64 time=1.359 ms
64 bytes from 192.168.0.1: icmp_seq=17 ttl=64 time=1.143 ms
64 bytes from 192.168.0.1: icmp_seq=18 ttl=64 time=1.218 ms
64 bytes from 192.168.0.1: icmp_seq=19 ttl=64 time=1.395 ms
64 bytes from 192.168.0.1: icmp_seq=20 ttl=64 time=1.197 ms
64 bytes from 192.168.0.1: icmp_seq=21 ttl=64 time=0.945 ms
64 bytes from 192.168.0.1: icmp_seq=22 ttl=64 time=1.092 ms
64 bytes from 192.168.0.1: icmp_seq=23 ttl=64 time=1.383 ms
64 bytes from 192.168.0.1: icmp_seq=24 ttl=64 time=1.200 ms
64 bytes from 192.168.0.1: icmp_seq=25 ttl=64 time=0.981 ms
64 bytes from 192.168.0.1: icmp_seq=26 ttl=64 time=1.425 ms
64 bytes from 192.168.0.1: icmp_seq=27 ttl=64 time=1.450 ms
Interfaces:
en1:
Card Type: AirPort Extreme (0x14E4, 0x8D)
Firmware Version: Broadcom BCM43xx 1.0 (5.10.131.16.1)
I hope Apple developers are reading this....
and its about time you start admitting that there is an issue here. Also, publicly available bugs can be useful here as well... -
Mountain Lion computers dropping Internet but none of the Windows computers are?
I have a small business network set up in my office. All the Windows computers are having no internet connection issues. All the Mac computers running Mountain Lion seem to be having this issue. I called my ISP and they say the router was configured to work for all operating systems. What could be the issue?
MacBook 10.8.4
These instructions apply to that one.
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. -
IMac 27in (Mid 2010) Lion - WiFi Drops on Sleep / Won't Wake on LAN
Subject says it all. As soon as I upgraded to Lion, I began noticing that when my iMac wakes from sleep, it's not connected to WiFi. It does automatically connect itself after about 60 seconds, but I get the popup box showing me all the nearby networks, and always have to hit cancel. I use only WiFi for this mac - no ethernet connection.
Annoying, but when I recently bought an Apple TV, I found that I can't connect to iTunes on the iMac if it's sleeping. I have to walk upstairs and wake the iMac up each time. Sort of defeats the main reason I bought the Apple TV - so I could bring up iTunes in the living room and listen to my music remotely.
I know many of you have this same issue, and it looks like it's been going on for a very long time. Several updates have been released, but none fix this issue. Researching this has grown very tiresome. Most suggested fixes aren't real fixes for, what has to be, a OS software issue and seem like wild goose chases. Everything was fine with Snow Leopard.
Posting this just on the off chance that I have missed a real fix.If you're running OS X 10.8.5 or earlier, then from the menu bar, select
▹ System Preferences... ▹ Accessibility
If the checkbox at the bottom marked
Enable access for assistive devices
is checked, uncheck it and test.
If you're running OS X 10.9 or later, select
▹ System Preferences... ▹ Security & Privacy ▹ Privacy ▹ Accessibility
If any applications are listed on the right and have a checked box next to them, uncheck all the boxes and test. You may first have to click the padlock icon in the lower left corner of the window and authenticate as an administrator to unlock the settings. -
Constant wifi drop & disconnect
My one month old iMac does not maintain an interent connection for very long. Sometimes it stays connected for <maybe> an hour, but MORE often it drops either the wifi signal all together or just stops connecting to the internet... when it does seem to have a connection it is VERY slow.
My solution: turn off Wifi wait a few seconds and turn it back on... which is very annoying, but that fixes it.
I have the latest software across the board. I'm running wifi on Time machine. My signal is strong. I have a Powerbook and iPad that connects to it without issues (for a couple of years its been fine until this iMac problem).
Any suggestions?There are actually many threads on this subject around here, like this one:
https://discussions.apple.com/thread/3190651?start=0&tstart=0
There are also many articles on Lion wifi drops. Here are my two cents:
I have a 4 month old iMac running Lion and for the first three months it worked beautifully, but I started having problems with my internet provider and they sent over a technician who changed my modem/router to a new one and configured a new network. He never even touched my iMac, it was all done on one of the PCs in my house, and immediately after that my iMac started dropping the connection all the time. All the other computers in the house (pc and Snow Leopard mac) are working fine.
I have read a thousand threads on this subject and apparently it is a known issue with Lion. There are many suggestions for solutions and I've tried every single one of them, including removing the network in the system preferences panel and then adding it back; or adding DNS servers to the DNS list; or changing the channel on your network (it should be lower than 11). If you search for threads here you'll find many of these supposed solutions, so I'm going to cut to the chase. The only one that worked for me is this:
Open Terminal (type Terminal into Spotlight)
Paste the following line exactly as is into the Terminal window:
ping `route get default | awk '(/gateway/){print $2}'`
Press enter
DON'T close the Terminal window. Just press cmd+H to hide it and leave it running in the background.
It is NOT a permanent solution and you have to do it every time you restart your computer, and you have to keep Terminal running on the background. It is a huge pain, but I find that connection drops every 10 minutes is an even bigger pain. Basically what this command does is send signals to the modem every couple of seconds so that the connection doesn't drop from being inactive. It won't affect anything else on your computer and it's not very system-consuming.
This seems to be the only way to have a steady connection for now, until Apple addresses the situation. They just issued an update regarding this issue last week or so, so I suggest you try to keep your system as updated as possible. This update only worked for me till my next startup, though.
However, like I said the problem only started after the technician changed my modem/router and network, so I suspect this is not a Lion problem, but a network problem. The only different thing I can think of that was done with the new network is that I used to have a WEP password and now I have a WPA2 Personal password. I intend to delete this new network and create a new one from scratch, but I haven't had the time yet. I suspect though that there could be some incompatibility with the actual machine (the modem/router), and not the network. I have not found any info on this and have not yet been able to figure out.
I hope this helps, if I find out something more I'll post about it, but in the meantime check out the other threads and google some articles, there are many different answers and opinions on this. -
WIFI DROPS OUT AFTER MOUNTAIN LION UPDATE
Since upgrade to mountain lion my wifi keeps dropping out after sleep i have ipad and that is ok.
Had the same problem and this worked for me:
Try deleting following two items:
~/Library/Preferences/com.apple.dock.plist
~/Library/Preferences/com.apple.dock.db
Make sure you take a screenshot of your current dock since deleting these files will reset your dock to default.
Now open terminal and do a sudo reboot w/ your password.
This solved the problem for me.
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