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My wifi drops every time I open my Macbook from having it physically shut in sleep state. I have to manually re-link my Wifi connection for it to work again. Once that didn't work, so I had to restart before Wifi came back.
 
I have a possibly-related problem. I can't get a connection on 5 GHz WPA2-Personal SSID, although it works fine for my 2.4GHz open and WPA2-Personal SSIDs. More details at http://richb-hanover.com/?p=108

Update: Good News! I'm not sure why, but rebooting my router seems to have cleared the problem. In fact, I'm posting this through a 5GHz connection... See my blog posting (above) for more details.
 
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There are some known issues with driver in certain type of wireless networks. Should be fixed in next version or after that. I know its annoying but thats why its developer preview.

EDIT: Co-worker said that she disabled 5GHz from her home network and it stopped random disconnects.

I can confirm that changing my wireless connection from 5GHz to 2GHz has kept the network connection stable.
 
I' m using 10.9 GM on a Mid-2010 17" MBP and Ethernet (not wifi) and as soon as I use Viscosity/Tunnelblick to open a VPN connection, I lose the internet, even if I then disconnect VPN/quit Viscosity/Tunnelblick or disconnect/reconnect Ethernet cable. I have to reboot to get it back.

This was exactly my experience except I'm using Network Connection from Juniper. Works fine after a reboot, but if I try to use the VPN connection to my work, it fails after about 5 minutes. Even after closing the VPN, the WiFi connection is unreliable until I reboot.

Details:
Mavericks was downloaded from the App Store
Mac Mini, mid 2010
Router: Airport Extreme
 
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Mavericks Wi-Fi problem and more

Try going to your System Settings>Networks, disable the Thunderbolt Bridge, click on wifi then click assist me>diagnostics, click on "wifi" button if it isn't already filled, then the "Continue" button. Click on your network in the list and then the "Continue" button. Then in the pop-up box click "Always Allow", when it tells you it's working click "Quit."
 
Hi, I have installed Mac OS X 10.9 Mavericks Developer Preview 1 yesterday.
I was wondering if I am the only one who has a wifi disconnection problem.
The wifi disconnects constatnly, especially on Safari, anyone had a similar problem?

One more question, I got the Setup Assistant and a Optimization message straight after the installation of Mavericks, and it won't go off. What should I do?

Try to change the router ip 10.0.0.1 to 192.168.1.**
i was having same issue at the office with Router Netgear wnr2000v4
No problem at my house with Apple Airport Extreme Base Station Router!
Hope this fix your issue!
 
solution

now I found the solution for my problem :D

my router transmitted via b, g an n . n seems to be the problem for mavericks.

I changed to b and g only and have no problems anymore, wlan runs stable;

perhaps try it out.

best wishes
 
2012 rMBP Wi-Fi drops, slow rates

At first I suspected my ISP of having speed problems, but today I tried copying a file in my local LAN over wi-fi. The transfer rate starts at 2.5mbps but drops to 540-580kbps.
My other wi-fi devices do not suffer any of this fluctuations.
A few times the wi-fi even got deactivated and I had to enable it manually.

Let's hope Apple is working on a 10.9.1 fix...
 
My late-2013 13" rMBP has had no wifi issues until today. It doesn't want to connect to my home network for more than a few seconds before losing the connection. After a restart it just kept searching and searching and not finding the network. All of the other devices in the house are fine (iOS devices, PCs, etc.). There are no other Macs.

I haven't yet downloaded the 13" firmware update because I don't have my MagSafe2 with me. Will that make a difference? I've had my rMBP since the 23rd with no issues with wifi until today.
 
Drops WiFi after sleep mode

I have MBAIR from August this year and it worked fine until last week when I installed Mavericks. Since then, if I leave the Mac for a few minutes or shut the lid it disconnects and requires the wifi to be switched off and then back on.
It has not, as of yet, dropped at any time during use.
I spent a pleasant hour this morning on the Mac Helpline and did everything that I was told. (Excuse me if I get some of the steps wrong nut you will get the idea):

- Reset router. No change
- Remove network and then reconnect. No change
- Start it up in safe mode and delete a few folders from the library (cache, cookies and launch agents). Try again no change.
-Start it up in recovery mode and reinstall OSX. No change.

At this point I ran out of time and had to get on with work. However they now want me to wipe my hard drive and reinstall from fresh (rather than just downloading OSX over the existing version) to confirm whether it is or isn't a hardware problem.
All very polite and helpful, the lad could not be faulted for anything. He did say they were not aware of this as a problem so maybe a wee white lie there :)

Anyone think this will solve the problem or is it just a tick box approach and they know it won't work?
The router is new from Orange (I'm in Spain) and iPhone 5 and Lenovo laptops are working fine with no disconnect issues. It does not drop either when I am streaming audio - only when inactive/asleep.
 
Anyone think this will solve the problem or is it just a tick box approach and they know it won't work?
The router is new from Orange (I'm in Spain) and iPhone 5 and Lenovo laptops are working fine with no disconnect issues. It does not drop either when I am streaming audio - only when inactive/asleep.
It won't solve it. This is akin to the olden days when we (tech support for Windows boxes, not Apple support) told end users not to call for support until they had rebooted three times.

I have the same issue. Early 2013 rMBP, clean Mavericks install (not upgrade over ML). I close the lid, come back in a few minutes, and it just spins the scan looking for a network indefinitely until I switch the wifi off and back on, then it finds it instantly. This crap has been going on since the first beta, it's not a hardware issue. I don't mind it enough to call Apple because it's quick and easy to turn it off and back on, but it is still annoying. Doesn't really feel like it's a big priority with Apple, fixing it.
 
Osx has a history of wifi problems. What fixed it for me (and others) was to go into your router settings and change the channel from (most likely) to a specific one (11 worked for me). Havent had a problem since.

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I have MBAIR from August this year and it worked fine until last week when I installed Mavericks. Since then, if I leave the Mac for a few minutes or shut the lid it disconnects and requires the wifi to be switched off and then back on.
It has not, as of yet, dropped at any time during use.
I spent a pleasant hour this morning on the Mac Helpline and did everything that I was told. (Excuse me if I get some of the steps wrong nut you will get the idea):

- Reset router. No change
- Remove network and then reconnect. No change
- Start it up in safe mode and delete a few folders from the library (cache, cookies and launch agents). Try again no change.
-Start it up in recovery mode and reinstall OSX. No change.

At this point I ran out of time and had to get on with work. However they now want me to wipe my hard drive and reinstall from fresh (rather than just downloading OSX over the existing version) to confirm whether it is or isn't a hardware problem.
All very polite and helpful, the lad could not be faulted for anything. He did say they were not aware of this as a problem so maybe a wee white lie there :)

Anyone think this will solve the problem or is it just a tick box approach and they know it won't work?
The router is new from Orange (I'm in Spain) and iPhone 5 and Lenovo laptops are working fine with no disconnect issues. It does not drop either when I am streaming audio - only when inactive/asleep.

Please try my above fix. Worked for me.

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My wifi drops every time I open my Macbook from having it physically shut in sleep state. I have to manually re-link my Wifi connection for it to work again. Once that didn't work, so I had to restart before Wifi came back.

Go into your router settings and change the channel off from auto.

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It won't solve it. This is akin to the olden days when we (tech support for Windows boxes, not Apple support) told end users not to call for support until they had rebooted three times.

I have the same issue. Early 2013 rMBP, clean Mavericks install (not upgrade over ML). I close the lid, come back in a few minutes, and it just spins the scan looking for a network indefinitely until I switch the wifi off and back on, then it finds it instantly. This crap has been going on since the first beta, it's not a hardware issue. I don't mind it enough to call Apple because it's quick and easy to turn it off and back on, but it is still annoying. Doesn't really feel like it's a big priority with Apple, fixing it.

To be honest this is not just a Mavericks issue, sure you may of only just got this since mavericks but its also effected other users on other os. Mountain lion did it to me. Osx doesnt like auto channel on routers for some reason.

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Hi, I have installed Mac OS X 10.9 Mavericks Developer Preview 1 yesterday.
I was wondering if I am the only one who has a wifi disconnection problem.
The wifi disconnects constatnly, especially on Safari, anyone had a similar problem?

One more question, I got the Setup Assistant and a Optimization message straight after the installation of Mavericks, and it won't go off. What should I do?

Have you fixed it? If not try my fix worked a charm for me (and others)
 
10.9 Continues to look for wireless

My MBP 13" is continually connecting then searching for networks, just like most here in the list. I have attempted to do just about every suggestion I've seen. I may have sacrificed a virgin in a volcano, but there is no evidence to prove that. Nothing I have tried has fixed the problem.

Changed router configuration - It happens in multiple locations, but I reconfigured my router on a set channel supporting only b/g.

Removed and reinstalled location configuration from network preferences.

Removed the reinstalled interface location in network preferences.

Set static iP addresses - silly but someone suggested it and it preceded the trip to the volcano.

Rebooted into safe mode and removed preference and cache files.

Ran disk utility repair.

Reinstalled OS X.

Reboot, Reboot, Reboot - Just in case Apple adopted the Microsoft method of problem solving.

I'm really at a loss. I have a lot of time invested here, stepping back to 10.8 may be my only option for now. Anybody have any ideas that I haven't tried?
 
Yep, I should have included those with the things I did in Safe Boot.

I have tried all of these suggestions as well. I am running Mavericks on my MacBook Air 2012 model. I have done 2 fresh installs of Mavericks. One time i restored apps and data from a time machine backup and the most recent time I restored only apps and no data. The wifi drops have started subsequent to installing Mavericks and all other devices on my network are working normal.
 
All of you have problems try this screwy fix:

1. Shutdown your Mac that has be having the problems and none of fixes helped.

2. Boot in Safe Mode

3. Go into System Preferences --> Network and click on the bottom button 'Assist Me' and create a new Costumed name Location and make sure you save and also Apply to completely save that change.

4. Reboot.

Se if these steps help, Good Luck.
 
All of you have problems try this screwy fix:

1. Shutdown your Mac that has be having the problems and none of fixes helped.

2. Boot in Safe Mode

3. Go into System Preferences --> Network and click on the bottom button 'Assist Me' and create a new Costumed name Location and make sure you save and also Apply to completely save that change.

4. Reboot.

Se if these steps help, Good Luck.

Tried this to no avail. I'm not sure what else can be done without Apple releasing an update.
 
Then have a tech look at it. Something is going on.

It has to be something with Mavericks, because I have never had wifi issues until after I upgraded to Mavericks. Computer worked flawless before. I'll contact support after Saturday since I'm busy these next few days for my CPA exam.
 
Well I have downgraded back to Mountain Lion and my wifi is blazing fast as it normally was before I upgraded to Mavericks. I am not sure what the issue is related to the software, but its definitely related to Mavericks. I will not be updating until Apple releases an official update.

I could not browse Safari more than a minute or two before my wifi connection would stop loading. I could not stream movies from my iTunes library to my Apple TV.

After downgrading back to Mountain Lion, Safari loads fast and all my movies can now be streamed from iTunes to my Apple TV.
 
Update

OK - following on from my post above. I got myself new portable hard drive and did a full backup. Then opened the MBA in recovery mode and selected the option to erase everything.
That took next to no time.
Then installed Mavericks again (6 hours on my Spanish ADSL line).
The Help desk fella told me not to restore anything from the backup disc at this stage and to give the MBA a different name from before so he could see if it worked when completely clean.

So I opened Safari, played about with it for last 12 hours - put it to sleep several times and it is working fine.
It is reconnecting to wifi network on every occasion.
I will have another call with the Help Desk today or Monday now to find out what I do next.
 
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