Macbook Pro Retina Wifi (5Ghz) lost on Wake

By the sounds of it you are having the same issues as myself. I've had to resort to using only the 2.4ghz mode as i couldn't stand losing the connection all the time.

Using inSSIDer shows no other 5ghz networks around other than my own yet i can still see drop other wifi networks suddenly disappear so not sure whats going on.

I'm tempted to do a clean install of OSX to make sure nothing has happened to the networking though i've a feeling this won't fix the issue.

Hello,

Same problem.

The 5GHz network won't reconnect after wake up. No way. The 2.4GHz is ok.

I have 2 routers and can't connect on 5Ghz after wake up.

If I switch off and on many times the interface it reconnects finally.

Is there solution?

I can connect to the 5GHz network on my dual band Airport Express router, and although I don't experience the dropout issues that you are, my internet is incredibly slow (my iPhone and non-retina MBP work very well on the 2.4GHz network). Sometimes pages don't load, they just try and try. Sometimes they load but without images or stylesheets.

This is stressing me out and I really hope Apple can address this. I have the 15" retina model which was a lot of money to pay for something that has serious issues with probably the most important function on the machine today.

I had the same problem when I got my MBP a year ago. Dropping off the network and same issue (at that time I didn't try 2.4Ghz vs 5Ghz) but I noticed that it was only a problem at my home. So I upgraded my router to a D-Link 815 which is a N Dual Band Router to overcome this problem by using 5Ghz or just trying a better router for that matter. I wasn't successful either because the network was just dropping.

So the solution I used for the past 13 months and works for my MBP Retina: since the problem was mostly about authentication I changed the authentication from WPA/WPA2 or WEP to nothing! but instead assigned my MAC address in the router for safe connection and rejecting any other device that is not listed. You can check this for yourself by testing your macbook connectivity when you don't put any password on your network and see if you have the same issue or not.

this is good for registering your device MAC address to your router : http://wintelguy.com/2010/20101024_mac_filter.html

Hope that works for you as well.

This solution not very reasonable even though I understand it works. I mean you disabled authentication and rely only on MAC address that can easily be spoofed.

I had similar problem with 5GHz but it seems that it was because I set a fixed channel instead of keeping it in auto. So far I had no issues.

Hello,

same problem.

I had this problem 2 years ago and still there on two differents macbook.

The 5GHz network won't reconnect after wake up. No way. The 2.4GHz is ok.

I have read that depends on the signal of the wifi near you; if some wi fi had different country code the mac choose another set of channels and 5HGz SSID desapphears.

If I switch off and on many times the interface it reconnects finally.

No solution on 10.9.4.

What can I say .. I have my router 2 mt of distance from macbook.

Ok my macbook is my macbook, router is the same router, Is it so dufficult save parameters and restore connection ?

Here's what solved the problem for me:

I went into my router settings and changed the SSID for the 5GHz band (the one that wasn't working).

It came up right away. Then I changed it back to the original name, because I like the name, and so that I wouldn't have to change all my other devices, none of which had any trouble on either band. It still worked.

Hope that works for you. For the record, I'd already tried safe boot and recovery mode without any joy.

I've been experiencing the exact same problem and the only fix for me was to rename the 5ghz SSID and not let the macbook sleep. We need a more permanent solution.

I can not see the 5G wifi too.....