Q: Wifi disconnects after sleep and takes long time to reconnect with Mavericks

Also to add some info: I experienced the same issue after a restart, so it's not only when waking up from sleep mode.

Following your lead, I fixed the issue by unchecking

System Preferences > Energy Saver > Put hard disks to sleep when possible

System Preferences > Energy Saver > Wake for network access

Hope this fix helps anyone

t

I've noticed this pattern as well. Dan

Hmm, I don't seem to have this option?

System Preferences > Energy Saver > Wake for network access

Could you please provide a screenshot, it might be the language (I'm running Dutch). Or is it not available on a Macbook Pro 15" Retina, early 2013.

I've actually found that if I turn off Bluetooth, this problem doesn't occur. Worth a try as it was an instant fix for me, and when I look back, it started happening after I enabled Bluetooth for the first time on this Macbook (brand new 2013 Air).

t

Thanks, didn't know this option is only visible when while charging it's not there when using the battery...

Oh wow, this actually worked for me. Toggling bluetooth on and off is far less annoying that toggling wifi

I tried too it's seems to work on my Macbook Pro 

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

I talked to a "genius" at the Apple store, and he told me that if you're running off battery, wi-fi will automatically turn off if your display goes to sleep; this has apparently been part of the OS since a few iterations back.  To get around this, you need to set the "turn display off after" timer in the energy saver preference panel to a longer period of time or never.

To prevent wi-fi from turning off when you're plugged in, check "Wake for Wi-Fi network access" in the power adapter tab of the energy save preference pane.

He suggested using "Caffeine," a free app you can download from the app store to prevent your display from going to sleep; you can toggle Caffeine on and off from the menu bar (instead of having to open up the energy saver preference pane).

I'm a bit worried that preventing my display from turning off will shorten the display life, but it seems this is the only way to ensure that wi-fi doesn't get disconnected.

Hope that helps.

PROBLEM SOLVED!!!

Was in contact with Apple Support Chat (amazing support as usual).

Resetting the System Management Controller solved my WLAN issue:

http://support.apple.com/kb/HT3964?viewlocale=en_US

Now if my Mac comes back from sleep, WLAN is immediately available and stable, as it was with Mountain Lion. Great!!

If resetting the SMC does not help, the second option is to reset the PRAM

http://support.apple.com/kb/PH14222?viewlocale=en_US

regards

Roger

This may solve your issues too:

https://discussions.apple.com/message/23709012#23709012

Are any of you running DropBox?

I have found that if I quit DropBox I won't ever have an issue when I wake from sleep with connecting back to WiFi.

WIth DropBox running, when I wake my machine it shows connected to WiFi, but no applications will communicate with the Internet. I must turn WiFi off and back on to recover.