iMac 5K Late 15 / El Capitan / No Wifi after sleep

[zerozoneice]

As the title goes, i don't have wifi connection after Mac wakes from sleep.
Sometimes it's disconnected, sometimes is connected but doesn't do traffic and needs OFF/ON cycle to reconnect to router and rx/tx data.

Same router, same 5GHz network, worked fine with a rMBP. So it must be something iMac related.
Anyone have this or have any idea how to solve? Thx!

 

[ZMacintosh]

what kind of router do you have?

 

[dud3tt3]

i've had this issue happen on my early 2105 13" rMBP. Not sure why it happens..seems to be random for me. A reboot always fixes it....I have an Asus RT-AC68U router. It's not happened at all on my new late 2015 27" retina iMac though.

 

[zerozoneice]

what kind of router do you have?

tplink. nothing to do with the router, on the rMBP i never had issues.
after researching a bit, it seems it's a widespread issue among apple rMBP/Imac hardware, not fixed in current capitan build.

i added a new location, as described in this article and so far it seems ok.
http://osxdaily.com/2014/04/24/fix-mac-disconnect-wifi-sleep/

just google "imac retina no wifi after sleep" and you'll get the idea.