Wi-Fi Not Working in macOS Sierra, Mojave or Catalina? My Solutions

Two days ago, I got a new MacBook Pro. It works well and perfect, but I found a confusing issue after my mac waking up from sleep mode, it cannot connect to Wi-Fi network. Strange it was showing full signal on the Wi-Fi icon on the top right bar of the screen. But keep “Looking for Networks…”.

After googling this MacBook Wifi problem online, find it happened also on the old Mac OS in Serria. So confused, why not Apple takes it seriously and fixes this Wi-Fi problem on its new MacBook?

Luckily, I’ve finally fixed this wifi not working issue after trying some online tricks. And these would be helpful. Read on my collects.

Methods to Fix Wi-Fi Issues on MacBooks

1. Re-connect Wi-Fi on Mac

Someones tried and found this Wi-Fi issue can be easily fixed by turning Wi-Fi off and then turning it on. But it didn’t work on my issue.

2. Restart MacBook

I followed some tutorial to restart my Mac to fix my Wifi issue. But it worked temporarily, and went into the same issue after Sleep Mode which makes me crazy!

3. Delete Wi-Fi preferences files

After turning off Wi-Fi, I went to the folder named SystemConfiguration by using Finder. The path is “/Library/Preferences/SystemConfiguration/”.

Wi-Fi issues on MacBook
Wi-Fi issues on MacBook

You can get the same window by using shortcut “Command+Shift+Go” or Finder > Go > Go to Folder…

On the folder, I deleted the preference files I list as below.

Delete Wifi Preference Files
Delete wifi preference files

After, I followed to restart my MacBook and turn on Wi-Fi. And finally, my Wi-Fi issue on My MacBook Pro was solved. Thank God!

Note:

Before deleting, I backed up some important data from my device to a portable drive since I don’t know what’s going to happen on my Mac. I’ve experienced data loss on my device before.  And for data secure, you are suggested to do a back also.

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