Wifi interface completely gone after catalina update on 2015 MBP

Hey there! I see lots of clever workarounds here. I’m surprised to see only a few mentions of creating a new network location:

https://support.apple.com/en-us/HT202480

This would typically reset the interfaces to defaults, which may be the fix with least resistance, (Although may not be the case for some, worth a try):

Locations > Edit Locations > “+” > Gove a location name > Done > Apply, test.

Id say if that doesn’t work, you’ve already tried a Reinstall of the OS, and you have your data properly backed up:

Open Finder > Go (Too Menu) > Computer > Macintosh HD (Usually) > Library > Preferences:

Scroll to the bottom and drag the folder “System Configuration” to the Desktop for a copy if you need to.

Then open the original System Configuration folder:

Delete:

NetworkInterfaces.plist

Com.apple.airport.plist

Preferences.plist

(And if there):

Preferences.plist (old).

Restart your Mac and test. Hope that helps!

Happened last night after changing out my speakers.

Lost wifi/bluetooth and had this error:

Software Versions:

CoreWLAN: 13.0 (null)

CoreWLANKit: 13.0 (null)

Menu Extra: 13.0 (null)

System Information: 12.0 (null

IO80211 Family: 12.0 (null)

Diagnostics: 1.0 (null)

AirPort Utility:

What saved me in this panic moment?

Apparently, one of the components became lifted/detached when removing the speaker connector. I don't know what part of the A1425 is marked with the star, but it has ribbon bands attached to it. Clicked it into place and resolved this situation.

Press down gently on all the components within and ensure securely connected.

Good luck!

I faced with the same problem (2018 MBP). This helped me: http://osxdaily.com/2018/11/19/fix-macos-mojave-wifi-problems/ (it's about Mojave, but works for Catalina as well). Just replacing old .plist files was enough. Wi-Fi works good now, although I still have CoreWLAN: 13.0 ((null)) CoreWLANKit: 13.0 ((null)) etc. in System Info.

Try using the COMBO Update. It can fix missing or corrupted files, even if you are (as in this case) already running 10.15.2.

No guarantee, but it is certainly worth a try.

Download macOS Catalina 10.15.2 Combo Updatehttps://support.apple.com › ...

Hi nahiable!

I made a post earlier about this. I don’t think that disabling System Integrity Protection to begin with is a smart workaround, please try these two, simple steps, see if either one helps!:

If you haven’t already, try creating a new network location:

https://support.apple.com/en-us/HT202480

This would typically reset the interfaces to defaults, which may be the fix with least resistance, (Although may not be the case for some, worth a try):

Locations > Edit Locations > “+” > Gove a location name > Done > Apply, test.

Id say if that doesn’t work, you’ve already tried a Reinstall of the OS, and you have your data properly backed up:

Open Finder > Go (Top Menu) > Computer > Macintosh HD (Usually) > Library > Preferences:

Scroll to the bottom and drag the folder “System Configuration” to the Desktop for a copy if you need to.

Then open the original System Configuration folder:

Delete:

NetworkInterfaces.plist

Com.apple.airport.plist

Preferences.plist

(And if there):

Preferences.plist (old).

Restart your Mac and test. Best of luck!

Resetting the SMC resolved the issue for me!

See guide here: https://thenextweb.com/basics/2019/07/23/how-and-why-to-reset-the-smc-in-a-mac/

never mind, the file was corrupt. I downloaded again and it worked

Steps 1 through 5 worked for my MPB 2015. Didn’t need the rest. Very cool. Thanks! Here’s the full list...

https://discussions.apple.com/thread/250720965?answerId=251753760022#251753760022

This is what worked for me on a mid-2014 MBP:

1. Download the modified wifi drivers (credit to Alex here) and unzip > you get a folder named WiFi_kexts
2. Boot into Recovery Mode: restart your computer while pressing and holding cmd-R
3. Open > Utilities > Terminal via Menu Bar
4. Type csrutil disable and hit return
5. Type reboot and hit return > computer reboots normally
6. Open > Utilities > Terminal and enter  cd  and hit the space bar (don't hit return)
7. Drag the folder WiFi_kexts onto the Terminal window and hit return
8. In Terminal, enter  sudo mount -uw /  and hit return, then enter your user password and hit return
9. Enter  sudo cp -r IO80211Family.kext /System/Library/Extensions/  and hit return
10. Enter  sudo cp -r IO80211FamilyV2.kext /System/Library/Extensions/  and hit return
11. Right-click on Kext Utility in the folder WiFi_kexts and choose open, click open in the following dialog, authenticate with your password
12. Wait for Kext Utility to complete – this took maybe two minutes on my setup, and I got an error message in the end, as well as "All done"
13. Reboot your computer normally and enjoy WiFi in Catalina
14. If you want to turn on SIP again you can boot into recovery mode again and enter csrutil enable (hit return) reboot (hit return)

Did you try the other things - reset NVRAM and SMC, create a new network location, restart in Safe Mode?

It is not likely to be a missing driver since I also have a 2014 MBP and Wifi works.

I don’t know what went wrong with your installation but I seriously doubt it is something to be fixed in an update.

At this point I’d try a clean install of Catalina on an external drive and test to see if that version can “see” your wifi hardware. I expect it will.

Hello,

I used this method 4 weeks ago and worked! https://discussions.apple.com/thread/250720965?answerId=251753760022#251753760022

Now, yesterday another Catalina update happened and my WiFi gone again. I tried same solution, but this time didn't worked. I tried three times and still no WiFi. I even tried Catalina Combo 10.15.5 and nothing.

WiFi details from System Report:

Software Versions:

CoreWLAN: 13.0 ((null))

CoreWLANKit: 13.0 ((null))

Menu Extra: 13.0 ((null))

System Information: 12.0 (1500)

IO80211 Family: 12.0 (1200.12.2b1)

Diagnostics: 1.0 (910)

AirPort Utility: Not Installed

My iMac is 27'' late 2015.

Did you reset NVRAM?

FWIW, I also have a 2014 MBP and Wifi is working normally.

See if the solution in this topic will work for you: No WIFI on left hand pane in Network.

I can't post links here, but the solution to the problem is available at github by user alessandro893. Search "github macos wlan driver" in google and follow probably the first link.