Wifi interface completely gone after catalina update on 2015 MBP

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)

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.

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

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

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!

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!

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 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.

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.

Hi Francisco,

Could you download the files at the end? would it be possible to share them?

Apparently the link is not longer available (i mean the "download" button is not working in the link provided above)

Thanks!

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 › ...

no proper solution. latest updates from Apple failed to fix the issue. But, the remedy listed here several times has worked for me. I applied it on 15.1, and then 15.2. At this point however, I doubt I shall ever patch my 2013 again; just too risky.

I’m having the same issues as OP after updating my 2016 MBP to Catalina. WiFi connects and disconnects every 30 seconds and something is wrong with the WiFi software saying null for everything. It’s definitely an update problem that should be looked into. Hacking into WiFi files and installing some unknown source files to get this to work is not an acceptable solution. Reformatting and reinstalling everything is also sledgehammer approach. If I could sudo apt-get something to fix this, I’ll be happy.

Follow this exactly and it works.

Well done.

I think it’s pretty poor that we have to resort to things like this. I updated to Catalina and the wifi completely disappeared from my system. No icon, nothing. It’s like there wasn’t even any hardware installed.

The answer was of course drivers and the solution above works.

Thanks again.

Hello Jog, I have a 15 inch MacBook Pro, mid 2012. When I upgraded to Catalina 10.15.3 I lost the wifi, went back to Mojave and continued without the wifi and went back to Catalina again.

Today I did the Wifi_kexts procedure and it didn't work, I repeated the procedure and it didn't work, so I upgraded to Combo update 10.15.3, continued without wifi, redid the procedure and it didn't work. I went back to Mojave and did the procedure and still have no wifi. Help please.

I had the same issue after updating in catalina from mojave. I read so many articles, watched too many youtube videos, I also tried on discussion forums but i dint get the solution and Finally I downgrade os to mojave.

Now I got the solution so i am going to share with you guys.

Go through this video link given below and enjoy wifi in catalina.

video- https://www.youtube.com/watch?v=4lE3UXVcMjc

Download Hackintool - https://mega.nz/file/lxQSXSDJ#lJVXvyOxBfS9unIXHaePZ4IyRhEyBsrXek7XmtkKTXU

if this work for you dont forget to vote and like the video.