MacBook Pro suddenly unable to connect to home Wi-Fi network

Wi-Fi Radio Signals from your Router fall off as the cube of the distance. Provided you are close to your Router and have clear line of sight and no competition from neighbors' Routers or known interference producers like microwave ovens.

All others need to do a more careful analysis to find out what is happening.

Wireless diagnostics:

Hold down the Option key while you click on the Wi-Fi icon on the menubar to open up the tools for investigating and fixing Wi-Fi issues

First is "Open Wireless diagnostics", which opens the wireless diagnostics Assistant, but does not proceed.

There are about eight different things you can do from here, but the top-level is to choose Diagnostics off the Window menu, or simply click continue, to do a quick check for Gross misconfiguration or operating problems. Your Admin password will be required. If any recommendations are shown, you should consider then seriously.

Next is to hold down the Option key and click the Wi-Fi icon as before. The screen that opens shows operating parameters of your Wi-Fi network. Screenshot, transcribe, or photograph the results and post back in a reply on the forums. Looks like this older one.

Createastupidusername wrote:

So I walked away from my MacBook Pro for like 5 minutes and when I came back it had disconnected from the Wi-Fi and now refuses to connect.

All other devices are connected,

I have tried restarting router and MacBook, ran diagnostics but it just told me that I should connect to a Wi-Fi network to connect to the internet (really useful info that and not at all completely unhelpful) and a bunch of WiFi best practices which doesn’t help when the issue seems to have just happened out of nowhere and without me changing something with the Wi-Fi

I don’t understand how one minute it’s fine and now it’s not.

I can’t test it on another network as like most people I only have one network at home. Yes the password is definitely correct....

[Re-Titled by Moderator]

Original Title: MacBook Pro refuses to connect to Wi-Fi even though it has previously had no issues doing so, diagnostics were full of nothing useful

shut down and restart all devices...and compare your results.

MacBookPro

Router

Modem

please test the WiFi chip of your MacBook first, ideally by connecting to another network.

no, I have not ignored the section in your post. Do you have an iPhone/other smartphone with a mobile plan? Please try to connect to the hotspot of that device.