[Solved] Mac loses WiFi connection after waking up from sleep

If you wake your Mac, iMac, Mac mini or MacBook from sleep mode, the WiFi connection may be terminated. Logging into the network every time or switching the WLAN off and on again can be annoying in the long run. Here you will find instructions that will guide you step by step through a few measures that ultimately ensure that there is a WiFi connection even after the Mac wakes up from sleep. If you have any questions, please leave a comment.

Your Apple Mac loses the WiFi connection after waking up from sleep? Here is a guide to solving the problem.

Your Apple Mac loses the WiFi connection after waking up from sleep? Here is a guide to solving the problem.

Solution to problem: Mac loses WiFi connection after hibernation

The Mac will terminate the Wi-Fi connection after it wakes up from sleep. This is a problem that you can solve without the support and without a visit to the Genius Bar in the Apple Store. You just have to do a few things in the system settings. Before doing this, you should make sure that you have the access data, i.e. the password for the network you are currently using, ready. If you have made a note of the password, proceed as follows:

  1. Opens via the -Menu the System Settings...
If your Mac, iMac or MacBook does not have a WiFi connection after hibernation, the solution to the problem will take you to the system settings.

If your Mac, iMac or MacBook does not have a WiFi connection after hibernation, the solution to the problem will take you to the system settings.

  1. Click on in the overview Networkto open the Wi-Fi settings
You will find the appropriate WiFi options in the network settings.

You will find the appropriate WiFi options in the network settings.

  1. Select the point in the list on the left Wifi and click on More options...
The other options in the WiFi settings area will help you further.

The other options in the WiFi settings area will help you further.

  1. Click in the tab Wifi in the overview of the saved networks and then select all entries with cmd + A
  2. Now remove all these entries with a click on the minus (-) and a click on "OK"
You should make a note of the password for the current WiFi network, as you will now delete all WiFi connection information from the macOS system.

You should make a note of the password for the current WiFi network, as you will now delete all WiFi connection information from the macOS system.

  1. Back in the Network-Settings you click in Environment menu on "Edit environment ..."
Click here.

Click here.

  1. Click in the overview that opens Plus (+), give the new environment a name and confirm with "Done"
Here you define a new WLAN environment.

Here you define a new WLAN environment.

  1. Then click on "Apply" and close the window
Now all you have to do is use the settings you have made, log in to the wireless Internet again and the Mac should be able to establish or maintain a WiFi connection after hibernation.

Now all you have to do is use the settings you have made, log in to the wireless Internet again and the Mac should be able to establish or maintain a WiFi connection after hibernation.

Finally, the Mac will surely ask you for the access data for the WLAN network, which you can now log into again. Enter the password that you wrote down before working through the points above. Now the Apple computer knows which WiFi network it can select and log in to - and that with a deleted and newly created network log that should ensure that the Mac automatically returns to the after waking up from hibernation WiFi connects.

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Source: iGeeksBlog

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17 comments

  1. John Steinbrecher says:

    Thanks. Very good solution

  2. Elizabeth Hillebrand says:

    Many Thanks! (I haven't tested it yet.)

    How can I prevent the networks from coming to the iMac from the mobile device?

    • sir appleot says:

      Hello Elisabeth! What exactly do you mean by "Mobile to iMac Networks"? Are you talking about WiFi data? If there are any things that the devices exchange with each other, then it should be the Continuity / Handoff feature. But maybe you will describe it again.

  3. Barbara schmidt says:

    Hello, unfortunately it did not work. I still have to deactivate the WiFi on my MacBook after hibernation and then reactivate it. Is there perhaps still a possibility, or what else could it be? It's just totally annoying! ????

    • sir appleot says:

      Hello Barbara! If none of this helps, I would test the following two things:
      1. Delete PRAM (here are the instructions)
      2. Install macOS over it (restart with CMD + R pressed and then install)

      Your data will not be lost if you install over it, but sometimes it solves one or the other inexplicable quirk of the system.
      If that doesn't help either, maybe you can try a different WLAN? For example, open a personal hotspot with the iPhone and see whether it also loses the connection. With this we could clarify whether it is possibly due to your router. Some Apple devices have problems with certain router models.

  4. Barbara schmidt says:

    First of all, thank you very much for your quick answer. So, all of my other devices that I have via the router, it is the Telecom Smart3, are working perfectly. That shouldn't be the problem. Your instructions "delete PRAM" are somehow difficult for me to understand because I am not the absolute "crack". Maybe my son, if he should come by today, has to "do it" to himself. I will let you know if something has happened. Greetings Barbara

    • sir appleot says:

      Hello Barbara! Thanks for calling the "Smart3". This enabled me to do better research and found suitable help in the Telekom forum: "I think the Speedport cannot properly use the WLAN AC standard. Switching to N meant that everything now runs smoothly, smoothly and consistently."
      Maybe you can ask your son if he can switch the WiFi to the N standard. Then it should work.

  5. Barbara schmidt says:

    Thank you very much. I'll ask my filius about that right afterwards. I hope this works because this eternal deactivation and activation is totally annoying.

  6. Kurt Lorenz says:

    I have the same problem as Barbara - I'm not a crack either.

    What is n?

    • sir appleot says:

      Hello Kurt! "WLAN N" actually stands for the WLAN standard "IEEE 802.11n". It is simply a different standard than the WLAN AC standard, which stands for "IEEE 802.11ac". WLAN ac is faster than WLAN n, but if the devices can't process it properly, that doesn't help much. Telekom's Smart3 router always selected the WLAN ac standard, but apparently a few problems with it. To bypass this, it is better to switch to the slower WLAN n standard in the router settings. I hope that was halfway understandable. : D

  7. Barbara schmidt says:

    Hello Sir Apfelot, since my computer noticed that I was intensely researching a solution, it has strangely been working again. I'm going to let it go that way and, if necessary, assign my son to carry out your solution. When we have done that, if necessary and probably soon, I will definitely let you know whether it has worked permanently. Thank you very much again !!!!!

    • sir appleot says:

      Hello Barbara! Sure, if it works now, don't change anything. : D And if he does bitch again, please let me know.

  8. Barbara schmidt says:

    Always my pleasure! THANK YOU !!!! ❣️

  9. Kurt Lorenz says:

    Dear knight,

    I'm not as lucky as Barbara, unfortunately. I don't find an "n" in the settings of WiFi that I could change. My provider is called "Magenta", with the settings only A1 is mentioned.

    My compi is good, but a real oldi, OX 10.7.5, and when I update, it says "up to date", but it is still 10.7.5. Perhaps that is the reason for all the evil, such as the impossibility of updating my GARMIN navigation system.

    Best regards! Kurt

    • sir appleot says:

      Hello Kurt! Yes, with such old systems there can always be problems. But what exactly is happening to you? Is the WiFi breaking down?

  10. Kurt Lorenz says:

    Exactly the same thing happens as with Barbara: no WiFi after waking up, it works after deactivating and activating. You recommended WiFi n, and I don't find that in the settings.

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