I cannot connect to wifi after Mac OS 13.2.1 (22D68) update

I had frequent drop outs when using my 2.4 Ghz wifi network, so I moved it to a 5Ghz network and it solved my problem. There seems to be too much congestion in the 2.4Ghz range if you have multiple devices. If your wifi router is capable of 5Ghz and you are using 2.4Ghz, then I suggest you shut off auto-join for the 2.4Ghz network and create a new 5Ghz network to connect to.

You can check whether you are using 5Ghz or 2.4Ghz by holding the Option key and clicking the wifi logo in the menu bar. Under the network you are connected to you will see "channel:" with the number and whether it is 5Ghz or not.

Using the Option-Wifi Icon trick, you will also see a "Open Wireless Diagnostics..." menu option. You can try that, it also has an option to monitor the connection. The reports it generates has not been very helpful for me in the past.

Another thing to try is to remove the wifi preferences. When you reboot, the system will make new ones and you will have to join your network again and enter the wifi password.

1. Quit all apps including System Settings.
2. Toggle wifi off by selecting it in the menu bar.
3. In the Finder menu, click Go > Go to Folder...
4. Type: "/Library/Preferences/SystemConfiguration/" then return
5. The files we are going to work with are:

com.apple.wifi.message-tracer.plist

NetworkInterfaces.plist

com.apple.airport.preferences.plist

com.apple.network.eapolclient.configuration.plist

preferences.plist

First move each of these files to the Desktop. Since they are System files, it will make a copy of them on your Desktop in case you want to move them back after we delete them. Now Delete each of these files from the SystemConfigurator window either by dragging to the trash or CTRL-Click and choose Move to Trash. You will have to authenticate this action since they are system files. Reboot, turn wifi back on, and choose your network again.