WiFi: No Hardware Installed after Mojave upgrade

I installed Mojave on my MBP (early 2015, 2.9GHz, 16MB ram) the other night and now have issues... in addition to God awfully slow performance, my WiFi no longer works... I have a “WiFi: No Hardware Installed” message where the signal indicator should be... all worked fine before the install.


I have run the AHT and no problems were found... I have tried booting in safe mode, I have reset the NVRAM, I have SMC, I have deleted the NetworkInterfaces.plist and rebooted... none have corrected the WiFi problem (or the slow performance)...


Anyone have other ideas?

Posted on Sep 28, 2018 5:55 AM

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Posted on Oct 8, 2018 11:27 AM

Finally found a solution, thanks to this post: Re: Mojave login UI sluggish & laggy


If you're booting from a usb drive, make sure to edit the file on the right volume. My MBP is now back to being healthy and working perfectly on Mojave... with WiFi!


TL;DR - on the native drive (/Volumes/Macintosh HD), got to /etc/ and rename the sysctl.conf file, reboot and voila!

152 replies

Oct 3, 2018 7:47 AM in response to Josh Hill

Same issues ("WiFi: No hardware installed" and turned my Late 2014 iMac 5K 4gHz I7 with 32gb ram into a sluggish 286). Installed Mojave on an external USB 3.0 drive and booted from there with no issues. At least I can get to my files and online.


Booting from the internal Fusion drive continues to be problematic.


Ran Disk Utility / First Aid on the internal drive without finding anything.


I've an appointment at the Genius Bar tomorrow. If no success there I'll downgrade, but that means having to wipe the drive because I'll have to go back to MacOS Extended (Journaled) from APFS.

Dec 25, 2018 6:20 PM in response to Uurfi

In the finder (with no applications running at all) go to the ‘go’ menu at the top. Near the bottom it should say ‘go to folder’ . When you click on that it opens a small window.


Paste this


/Volumes/Macintosh HD/ETC


into the window


click the go button


you might have to enter your password


in the folder look for this file


sysctl.conf


if you find it delete it and empty the trash


then restart your computer

hopefully that helps


Jeff


Feb 19, 2019 2:31 PM in response to Josh Hill

Installed Mojave on my iMac (after two quick and successful MacBook Pros) a couple of months ago and was completely screwed- like swimming in molasses, and with no internet. First ever Mac OS upgrade that went awry. Spent hours on the phone with Apple Support. Read this and thought I'd try. Terminal found and renamed the suspect file, and now I'm running Mojave.


Thanks for finding and posting this!

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WiFi: No Hardware Installed after Mojave upgrade

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