So I took the plung and upgraded my Late 2013 Macbook pro from Mojave to Catalina. Everything else "seemed" okay apart from the fact that I had no wifi. The icon was greyed out. I tried all the usual advice, SMC and NVPRAM/PRAM resets. I even deleted the Network plist file but still the wifi icon was greyed out and from the System Information App all I had under Network -> Wi-Fi was:

  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:

In the Network app, the Wifi interface isn't listed when I tried to manually create the wifi entry. In the end I was ready to take my Macbook pro for repairs as I believed that my wifi interface was fried. Then I decided to downgrade back to Mojave and it worked perfectly.

I tried the upgrade again up to Catalina and the wifi problem showed up again. So now I'm back on Mojave. The supprise for me is according to Apple model of Macbook pro is supported by Catalina so I'm not sure whats going on.

  • I have the exact same problem on a 2015 MBP 13"... – Giovanni Caporaletti Oct 9 at 18:04
  • I have same issue. Anyone find the solution? – Bhavesh Kumbhani Oct 11 at 6:28
  • Facing the same issue also with a Late 2013 MBP 13" – cozeJ4 Oct 11 at 10:36
  • @GiovanniCaporaletti have you made any progress with your issue? I'm still back on Mojave as a result. It was such a pain getting my machine back up to scratch wouldn't want to risk is again. – Napoleon 2 days ago

I had the same issue. Updated to catalina overnight and in the morning wifi was not working. I reinstalled catalina from Recovery again. Now wifi is working even though System Information App still shows (null) for Network -> Wifi entries

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