Macbook Air wont recognise correct internet password

[alexismobeal]

Hello all, I have a 2012 Macbook Air and I'm having connectivity issues.

About 2 weeks ago it stopped connecting to my internet. It forgets the password and insists that the password I'm putting in is incorrect, even though it isn't. The password is definitely correct, I've checked over and over. Other devices work fine with the network and the Macbook connects to my mobile hotspot. On a few very rare occasions I open it up and it's connected. I use it, close it, and when I come back to it it's disconnected again and wont recognise the password.

Any idea what the problem is? Cheers!

 

[joshlalonde]

I'm going to need a bit more information.

What kind of Router do you have?
Does the MacBook 'forget' password for other networks?


Off the bat, I can guess a few possibilities.
1) Your MacBook has a hardware problem - most likely
2) Your MacBook has a software problem
3) Your router is glitchy - possible, but not likely

Also, do you use a USB3 device? Apparently, USB3 devices can interfere with the WiFi signal.

 

[alexismobeal]

I'm going to need a bit more information.

What kind of Router do you have?
Does the MacBook 'forget' password for other networks?


Off the bat, I can guess a few possibilities.
1) Your MacBook has a hardware problem - most likely
2) Your MacBook has a software problem
3) Your router is glitchy - possible, but not likely

Also, do you use a USB3 device? Apparently, USB3 devices can interfere with the WiFi signal.

Hi, cheers for getting back to me. In answer to your questions:

1) The router is a BT Home Hub 5 Type A.
2) It doesn't forget other passwords. Although the only other network I've used it with since the problem started has been my wifi hotspot. It has never forgotten the hot spot password though and always finds the network and connects easily.
3) I don't use any usb devices with the Macbook Air.

I have had issues with my internet service, but when this happens, it affects all devices connected to the network.

 

[Mrbobb]

Always good to try:

Go into advanced network setting and DELETE the SSID from the Preferred List. This makes it to "forget" whatever there before, including any pwd. Then refresh the SSID list and pick the desired router and starting this thing as if you are connecting it for the first time.

 

[joshlalonde]

1. Try the trick above.

2. If that doesn't work: backup your files, and then re-install OS X.