Wifi issue with Macbook pro after updating to OS Catalina

"Changing what Opens at startup" suggests that you may get relief by starting in Safe Mode (hold shift at startup).

Safe mode loads a little bit of software, then does a five minute disk repair, then selectively loads the minimal set of Apple-only extensions, Not including graphics acceleration, so screen updates will be wonky and slow, but ultimately accurate. Your Userid and password is required, even if you normally auto-login.

Safe Mode takes defaults for everything it can, but changes you make in Safe Mode will "stick" in regular mode.

"Works in Safe Mode; fails in regular mode" implicates something you added.

There are a number of people who are having problems with connecting to WiFi using captive access points. The ones that pop up a menu when you try to access them, and asks you to accept the conditions. Are your problems solely on these captive access points, or also on access points that use a password but don't have an acceptance page? Previous versions of MacOS had auto-login and auto-join parameters for each known access point. Catalina only has auto-join. Try the following

1. Go into System Preferences and select Network.
2. Click the "Advanced" button
3. Choose the WiFi tab at the top
4. You should now see a list of known WiFi access points
5. Find the point that you are trying to connect to, and use the + and - keys below the list to remove it from the list.
6. Turn off WiFi and quit Safari
7. Do a shutdown, wait 30 seconds, and restart the computer
8. See if it works now

People have also suggested creating a new Location on the Network page and trying to logon using the new location.

Let me know how it goes.

When Hardware disappears, try an SMC reset to bring it back:

How to reset the System Management Controller (SMC) on your Mac - Apple Support

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One solution that could be tried is to use

System Preferences > Network > Wi-Fi ...

Under the list of interfaces, there is a Plus[+] Minus[-] and a gear.

Your Wi-Fi is already not working, so there is nothing to lose. Try selecting Wi-Fi and hit minus[-]. Then use the Plus[+] and add it Wi-Fi back to the list.

Then If it does not perk up right away, try turning it off and back on again.

The let us know if anything changes, and what the status becomes.

Well this I can do for you, this I understand. And in another thread they explained it the same.

1. Download the modified files (thanks Alex!) 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 (detailed instructions here)
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 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)

I have done all this and I still did not get the driver to work, in other words I still have the same problem :(

But I hope this will work for you Prashant2908 Try that and let us know!

You still have a software problem, as the versions of CoreWLAN and CoreWLANKit and MenuExtra are still showing ((null)) should be something like this [from my MacPro running Mojave]:

  Software Versions:

  CoreWLAN: 13.0 (1375.2)

  CoreWLANKit: 13.0 (1375.2)

  Menu Extra: 13.0 (1380.2)

  System Information: 12.0 (1300.2)

  IO80211 Family: 12.0 (1200.12.2)

  Diagnostics: 1.0 (805)

  AirPort Utility: 6.3.9 (639.9)

  Interfaces:

what Status is showing in:

system preferences> Networks > Wi-Fi ...

like this pane:

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Another commonly-suggested "fix" is to try in Safe Mode.

Apple is not here. Apple Support Communities is a User-to-User support forum. If other users can not help you think of a fix, No further help is likely to be forthcoming using this medium. There are no standard mechanisms for escalating problems to Apple Support from here, and Apple Engineering and Marketing Movers and Shakers do NOT monitor these forums looking for trends and outstanding issues.

DO NOT "wait for Apple to provide a fix". Unless and until a large number of users present their issues through standard problem-reporting channels, Apple does not know there is a problem, and is NOT working on a fix. Being selfish is the best policy, getting yours fixed helps everyone.

If advice supplied here does not provide resolution, You must take additional steps to resolve your issues. Contact Apple support directly through one of these methods:

• contact telephone support (free for 90 days with a new Mac, of for three years with AppleCare purchase)

• make an appointment at the genius bar at an Apple-owned store for hardware evaluation and advice (free anytime, but after five years parts may no longer be available).

• initiate an Online chat

• Visit an Apple Authorized Service Provider (there may be an "evaluation fee", but if they perform any service for a fee, ask for a rebate of the evaluation fee).

If you want to send your preferences directly to Apple use the feedback links:

Product Feedback - Apple

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A letdown to have Apple release a software that wasn’t troubleshooted enough. I miss Steve Jobs and his insistence on perfection. Apple controls its hardware and software. Still not having a solution shows that either they have no access to their own older laptops to troubleshoot or just don’t care enough. I downgraded and everything works fine now.

Try restarting your computer and see if Wi-Fi turns up.

Also in safe mode the problem is still there.

EXTRA INFORMATION:

When you install Catalina you have a WiFi adapter present. But I didn't have a Wi-Fi connection. When troubleshooting, and the Wi-Fi is removed from the network preferences, you can't get it back, because it does not have or detect any Wi-Fi interface.

I found a youtube movie that show the problem exactly which we have: https://www.youtube.com/watch?v=eptD8WRslXo

His solution was......get back to Mojave and stay away from Catalina! This isn't a proper solution :(

@APPLE read this discussion and help us out here!!!!!

UPDATE: I get allot of messages about my last reply. People are telling me that this should have worked, and that I need to do it again. Well I did that three times already.

Information:

-The update worked, but it did not solve the problem.

-When running the Key Utility I did not get any errors....completion 100%

-And when I look at my software version is tells me have version 2 again

_______________________

Software Versions:

CoreWLAN: 13.0 ((null))

CoreWLANKit: 13.0 ((null))

Menu Extra: 13.0 ((null))

System Information: 12.0 (1355)

IO80211 Family: 12.0 (1200.12.2)

Diagnostics: 1.0 (910)

AirPort Utility: Not Installed

_______________________

Extra Information:

We had the exact same issue on the macbook pro of a colleague of mine, exact same Macbook pro (Retina, 13", mid 2014)

-We installed Mojave again => WiFi worked perfectly

-Upgraded tot Catalina again => same issue

-Installed the Mojave version 2 Drivers with the Key Utility => same issue => no WiFi, no WiFi device

Any other suggestions to help us people out with these issues?!

this is what mine shows. Seems like Catalina isn’t able to detect the hardware. I have a 2013 MacBook Pro. Not the op but have the same issue

¿What model MacBook Pro by year, early mid late, screen size and processor speed?

We are trying to find something in common, and no one has been forthcoming about what Mac they own.