10.13 High Sierra Wi-fi issue

Update process from 10.12 to 10.13 on mid-2011 iMac was uneventful. However, an issue is that after a shutdown/restart or waking from sleep, wi-fi won't automatically connect. Turning wifi off/on doesn't change anything. Wireless network SSIDs are hidden, so they don't usually (sometimes do) show up in the network list. After clicking "turn wifi on", when they show up in the network list, choosing one will make the connection. Steps I've taken:


  • Reboot wireless router
  • Remove existing wifi configuration files from /library/preferences/systemconfiguration, followed by reboot
  • Create new profile, reboot, still no automatic connection
  • Added a couple of DNS servers (8.8.8.8 and .4 for now). This didn't change anything
  • For the first time in forever, did an SMC reset, which didn't change anything


There were no wifi issues with Sierra 10.12, so this is new.


Open to any ideas. TIA!

null-OTHER, macOS High Sierra (10.13), null

Posted on Sep 25, 2017 3:35 PM

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Question marked as Top-ranking reply

Posted on Nov 28, 2017 9:43 AM

I had the same issue you guys have and after serious hours of troubleshooting I figured that my AT&T router has a feature called Band staring. For the feature to work you have to setup both band SSIDs 2.4Ghz and 5.0Ghz) with the same name, So the computer will decide to connect to the band that offers a better signal levels. Apparently High Sierra does not handle this very well and gets confuse. As a temporary fix, I have set diferent names for the SSIDs and now I can connect to either band with no issues. It will connect at wake ups or reboots. Apple still need to come out with a solution for this.


Hopefully this would work for you guys.


MBP 13’ mid 2012.

139 replies

Nov 14, 2017 1:43 PM in response to BGreg

I have the same issue on MacBook 13" Pro 2012. After Upgrading to OS High Sierra 10.13, The Wi-Fi connections dropped. It does not matter if it is coming from sleep or reboot, it looses it. My SSIDs are not hidden. I have a Dual band AT&T Router. 2.4Ghz and 5.0Ghz SSIDs are named the same. Previous version of Sierra never had this issue.


I do not have wired connections, so it is imperative to get a solution as soon as possible.


HELP ! ! !

Nov 14, 2017 5:42 PM in response to Petxi

I have a Mac Mini and my WiFi cut out while I was browsing the internet. In spite my looking at forums and going to Apple’s website for troubleshooting my Mac is unable to detect the router in our home. In short I want to let people know this is a problem not only with iMac but also with Mac Minis. I am going to have to take my Mac in to a tech to fix my problem.

Nov 30, 2017 5:00 PM in response to Cancerinform

I was on chat with Apple Support for 3 1/2 hours last night trying to get this issue fixed. iMac 2009 installed OS High Sierra Wednesday subsequently no internet connection. I have read all the posts here and we have tried just about everything mentioned. I have made an appointment to take to Genius Bar. But now I am not so sure I will get the help I need. Not even Apple Support told me this was a known issue. I have never had a problem with my iMac since I bought it in 2009. This is the first issue. 😟

Dec 7, 2017 12:50 PM in response to BGreg

I've upgraded 10.13.2 and I still can't connect to 5Ghz reliably. When I do connect, I'm lucky to get 5-10Mbs down. I've tried everything on every forum I can find. So I'm stuck using 2.4Ghz like it's the 1990's.


I'm new to these forums. Does Apple ever actually assist anyone here or do these posts just go into the ether?

Dec 7, 2017 11:37 PM in response to thornr

thornr wrote:


I've upgraded 10.13.2 and I still can't connect to 5Ghz reliably. When I do connect, I'm lucky to get 5-10Mbs down. I've tried everything on every forum I can find. So I'm stuck using 2.4Ghz like it's the 1990's.


I'm new to these forums. Does Apple ever actually assist anyone here or do these posts just go into the ether?


This is a user to user community; Apple largely only enforces the terms of use for the forum.


5 GHz has much reduced range as compared to 2.4 GHz and you needn't go far before 5 fails to work as reliably as 2.4.

Dec 8, 2017 8:15 AM in response to Dogcow-Moof

Unfortunate about Apple.


I'm literally 3 feet away from the router. The windows (gag) box beside me is getting 100+Mps Down. My mac is getting about 9 on 5Ghz When I was able to connect to it. On the 2.4 it's getting around 30. This was fine until High sierra.


I'm downloading stuff to my windows box (gag) and using a USB drive to copy it to the Mac.

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10.13 High Sierra Wi-fi issue

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