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User profile for user: roytendai
roytendai Author
User level: Level 1
4 points

macOS failing to access wifi after upgrading from Mojave to Big Sur

Hi.

I have a MacBook Pro 15inch Retina (Mid 2014) laptop and have been facing wifi connection issues every time that I upgrade from Mojave to Big Sur.

I have tried this 3 times and all 3 times my wifi fails to connect.

If I check on the Wifi preferences, and tried to recreate a new wifi configuration etc. I have also tried the method of backing up and deleting the network files located in : /Library/Preferences/SystemConfiguration/, and still to no avail.


Is there any way of resolving this? Please help!

MacBook Pro 15″, macOS 10.14

Posted on Oct 4, 2021 8:59 AM

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User profile for user: MrHoffman
MrHoffman
Community+ 2024
User level: Level 10
126,025 points

Posted on Oct 4, 2021 10:13 AM

Have you tested this on another Wi-Fi network?


This test to see if the problem is local to one Wi-Fi network, or more likely local to the Mac.


Also see what Wireless Diagnostics report, if that’s not already been tried:


Use Wireless Diagnostics on your Mac - Apple Support


If your Wi-Fi is configured to use MAC (MAC, as differentiated from Mac) authentication, try disabling that and testing.


Insecure Wi-Fi security (unencrypted, WEP, WPA, WPA2 TKIP) settings should cause a Mac running newer macOS to display some grumbling, but will not block Wi-Fi network connects. WPA2 AES, WPA2/WPA3 transitional, and WPA3 are preferred by Apple.

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User profile for user: MrHoffman
MrHoffman
Community+ 2024
User level: Level 10
126,025 points

Oct 4, 2021 10:13 AM in response to roytendai

Have you tested this on another Wi-Fi network?


This test to see if the problem is local to one Wi-Fi network, or more likely local to the Mac.


Also see what Wireless Diagnostics report, if that’s not already been tried:


Use Wireless Diagnostics on your Mac - Apple Support


If your Wi-Fi is configured to use MAC (MAC, as differentiated from Mac) authentication, try disabling that and testing.


Insecure Wi-Fi security (unencrypted, WEP, WPA, WPA2 TKIP) settings should cause a Mac running newer macOS to display some grumbling, but will not block Wi-Fi network connects. WPA2 AES, WPA2/WPA3 transitional, and WPA3 are preferred by Apple.

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macOS failing to access wifi after upgrading from Mojave to Big Sur

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