WiFi: No Hardware Installed after Mojave upgrade

My experience, others' may vary, was that doing a clean install followed by Migration Assistant where you migrate everything except "Other files and folders" from an existing High Sierra clone was what worked. Restoring from a Time Machine backup did not work for me, and in fact seemed to restore an app that I had deleted.

I had B/U on my TM before the upgrade so I did just a backup recovery. No need to install anything.

1. Start the computer in Recovery mode: Command-R after you hit the power button and hold it until the Apple logo shows up (I kept holding until it completed the boot up)

2. You will see a screen with options: Select first option is Recover from Time Machine Backup

3. You will see your various backups: select one that was before you upgraded to Mojave

4. Follow to next screens and you will be told that the disk will be erased and you will lose all info. Accept/OK and continue. The recovery will bring everything back: data, files, folders, MacOS, ...

5. Your disk will be erased (reformatted I think) in about 3-4 min. Then recovery will start.

6. I have a 512GB disk so it took about 10 hours to recover all.

That's all! Good luck.

Hi. Thankyou so much the problem solved my WiFi is back and working. Just reinstalled os Mojave from recovery and after installation each and every thing is back to normal even all the my previous files and desktop is intact.

Thankyou all ans especially Jeff

Can confirm, this worked for me. I had no wifi hardware message and a very sluggish system. Renamed the sysctl.conf (it was from 2012) and all is well now.

Certainly if you restore from a back up from before you updated to Mojave.

I had to reinstall the whole Mojave 10.14.2 and when everything was done my WiFi works. End of story. Do that.

Quick update: current resolution from Apple is to bring the device to a store where they will make sure to remove all Kernel extensions (e.g., Little Snitch, AirParrot, VPNs, applications such as Parallels).

Here's what worked for me:

1. Navigate to your Applications/Utilities folder and open the Terminal app
2. Copy and paste the following line exactly as written, being careful of spaces and syntax:
   sudo mv /etc/sysctl.conf /etc/sysctl.conf.bak
3. Enter your login password when prompted
4. Restart your computer and you should be good to go!

APFS came with High Sierra. As previous posts indicated, booting to recovery and restoring a backup from Time Machine will erase your drive and restall the backup. Once you get this process started it’s hands off until it’s done. This can take a number of hours.

Worked like a charm for me. Under "Go" in the finder menu, go to folder /etc/. I renamed it aysctl.conf and rebooted. It is now a functional computer. I have a lot of legacy junk so a clean reinstall might be a better solution in the long run, but this works for now.

Make sure you search for the file correctly. There are spaces in the suggested search string (as well as the suggested renaming string). The easiest way to be sure you get it right is to copy from the OP instructions, and paste into the terminal screen.

I had found several threads about these issues. One of them suggested that VPN software was causing similar issues. I did uninstall my work VPN (anyconnect) and that did get rid of some issues. I was able to reinstall anyconnect after I got Mojave up and running.

Were you able to get into the folder under ETC?

If the sysctl.conf file was not in that folder, you issues are coming from somewhere else I'm afraid.

Jeff

Make sure you open a ticket with Apple. Still working with them to resolve the issue on my end. Make sure you ask for a Senior Advisor.

Just updated to 10.14.1. No issues. Many thanks to JoeMan71 and to everyone that tracked this issue down.

Plug into the ethernet