Losing network or internet connection after sleep/wake

Thomas: the same thing is happening to me it seems, there are other threads with this same Mavericks problem. I have contacted applecare they have been looking into it for over two weeks and their engineers have not come up with any fix yet, but the file is open. I will keep people posted but any other ideas? m@rk I also deleted the systemconfirguration file upon your advice but no luck, it didn't work...

Seeing as many people have this problem, it also seems to be a mix of router problems. Changing the wifi password encryption to WPA2 personal also fixed this problem.

I just tried that also and after it dropped it still could not reconnect - the network name always defaults to blank, it is never there if I check the network afterwarsd, I have to manually re-enter the wifi name and apply...

Following Reforger's advice didn't cure my network dropping out problem completely, but it did significantly reduce the frequency with which I have to turn wireless off and back. Similarly, waking from sleep now reconnects about 50% of the time whereas before it was zero.

The only things I have found that are completely effective at preventing the drop outs with Mavericks is (a) use an Apple Airport Extreme router or (b) setup your non-Apple wireless router to only use 801.11g as it seems to be 801.11n that Mavericks struggles with. My router at home has both an "n" channel and a guest "g" channel. I don't get any drop outs when I connect via the guest channel, but do when trying to use the faster "n" channel.

Deleting the system configuration files was unsuccessful. However, following the instructions in the original post + having booted to safe mode (saw this mentioned somewhere, dont know if it is necessary) I created a new location setting wlan first in order and voilà! Now it has worked ok so far. Let's see how for how long. What I didnt do was disable the other service (LAN). Anyway, thanks a lot for this tip. I thought this kind "features" were reserved only for Windows. A real nerve wrecker.

Slightly off topic: if you go to advanced settings in network and save a password for a specified router, is it still possible to edit that entry somehow? I accidentally mispelled the name but could not edit it anymore, only delete and recreate was possible.

Today i had a self assigned IP after a week since i change the automatic location to HOME. The time machine crashed and back up failed. I don't know what to do. Now the time machine says sparsebundle is in use . The hard disk time machine back up is a an ethernet hard disk.

I have read on the internet if you have a router that is older it may not support IPv6. WARNING if you are using IPv6 don't do this hint because it's for only older wireless routers that don't support IPv6.

So go into System Preferences->Netowrk, Airport section. In Airport click on the 'Advanced' button and in the TCP/IP mini-tab in the 'Configure IPv6' and use the toggle bar to 'Link-local only'. Then make sure you click the OK button and it spits you out to the main Network pane click the 'Apply' button to save this configuration.

Although wireless works much better now than before I created the new location, it still drops the connection when going to sleep. After having dropped the connection, the router is no longer visible in the list.

I have a new Macbook Air running Mavericks and new 802.11ac Airport Extreme router.

My problem is that the MBA drops the internet connection after waking from sleep. I tried the solution offered by the OP, but it didn't work.

In my case, here's what I have to do to get a connection again. I open the Network preference pane, and then choose "Assist me..." and then "Diagnostics". Invariably it will show a green light beside Wi-Fi, Wi-Fi Settings and Network Settings. I have 5 bars showing in the WiFi menu bar icon. But ISP, Internet and Server will be yellow.

When I go through the steps prompted by the wizard, the ISP/Internet/Server lights turn green on the third screen where I select the wireless network I want to join.

I'm not sure if this is the same problem described here, or a different one? Is this what you are all experiencing?

It seems as if it's connecting to the WiFi network when it wakes from sleep, but losing the internet connection?

I'm going to start a new thread in case this isn't the same problem.

Update: My connection is working now, and I don't know why. I removed the folder from librarysystem preferences, I re-inputted all the information from the original thread here in network (new location, new set order, make inactive etc) and nothing as I mentioned above worked right away, but after a few days it suddenly started connecting. The ONLY other thing I did in this time was I went off site with my Air. I left the house and it was in my bag as I ran some errands which I hadn't done since before Mavericks download, and it started connecting after that. It sounds weird I know but it seems somehow the system had to disconect from the server area in order to work again. I couldn't tell you whether it is simply that as a quick fix or it was a combination of that plus one of the other fixes from here, but it has been a five days it all works perfectly again. We will see how long it lasts but my recommendation is to do all of the above AND go off site - see if it works for you too.

You might be on to something there. I was still having a few drop outs from sleep after setting up the new location, but having taken the computer into work and connected it to the work network, it now doesn't drop out either at work or when I take it back home. Maybe those still having problems with drop outs after setting a new location could try connecting their laptops to a public, work or friends wifi network and see if this fixes the problem.

Unfortunately I have taken my Macbook Air out and about several times and connected to other networks, and I still have the problem.

Did you do the other steps listed in this thread? As mentioned I did them all, not sure which or what helped but it may be a combination of them, or them all. It's the only other thing I can think of, that and if applecare still comes back with something I will let you know. Their engineers have heard all about this problem they tell me, and are working on a fix..