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Wifi connection has password issue with my Macbook Pro

Ask Different Asked on October 30, 2021

I have a 2010 Macbook Pro (running Snow Leopard) and I connect to my home internet thru Wifi (via Thompson router).
The problem is, after I choose my Wifi from a list of Wifis and enter the password, majority of the times it fails to connect saying “Incorrect password”, even though its correct. All I have to do is keep pressing the return key until a connection is established.
Very few times I get connected automatically without a need to enter the password and sometimes I get the connection on the first attempt, but usually it takes around 5-10 tries.
It doesn’t happen to my Windows (vaio) laptop though.
Anyone seen something likely and got it fixed?

6 Answers

I recently revived an old MacBook Pro, that could only run Snow Leopard 10.6.8 and suffered from an inability to log in to the wireless network, despite using the correct SSID and password.

I fixed it when I discovered that I had set my router up with slightly differing security protocols for the 2.4GhZ and 5Ghz bands, using the same SSID and password for each. In one I had set it to 'WPA2 Personal' and in tho other as 'WPA2/WPA Personal'. Making both 'WPA2/WPA Personal' solved my problem, and now the MacBook can successfully connect to the wireless network (reportedly using WPA2 Personal and on the 2.4GHz band, of course).

Answered by Richard Millwood on October 30, 2021

I spent two hours

  • Removed the Wifi Service then add it
  • Removed all related keys (password) from the KeyChain
  • Deleted related config from /Library/Preferences/SystemConfiguration
  • Reset the Router password, changed the Wifi SSID

and nothing worked, Finally after removing the USB device, I was able to connect, it seems strange, but it may help someone

Answered by amd on October 30, 2021

I have the same issue, and it's driving me nuts.

If I leave MB running unattended, say, overnight, or even if I shut it down, the next time I log in it fails to see the the router. (BT Infinity)

It's not the router, as my iPad and iPhone and other wireless kit I have never have the same problem.

  • I've tried repeatedly putting in the password without success.

  • I've also scanned for malware and virus using Avast and Malwarebytes and no issues.

  • I've repaired permissions etc all to no avail.

It is very frustrating.

The only thing that consistently works is to do the following:

  1. Shut my MB down.

  2. Power down my router and leave it like so for 10 to 15 seconds then power it back up again, wait until router is ready (on BT Infinity it turns Blue)

  3. Start up MB and log in and bingo it's fixed ! Generally it stays good for the rest of the day providing MB is used even occasionally. Hope this is of some help

Answered by Kenny on October 30, 2021

For others finding this thread because they too have the problem:

On my wife's MacBook Pro, the answer turned out to be that the laptop could not differentiate between the 2.4GHz and 5GHz version of the wireless, and if it connected to a different one than last time, told her the password was wrong. The cure was to 'split' the two wi-fi networks by adding '-5' to the 5GHz version SSID, then the Mac could tell them apart. It has the same passcode for both networks (although they could be different) and is now happy to connect to either, every time.

Why this suddenly crops up for some, is down to relative signal strength on each frequency, and maybe a new router having the 5GHz band for the first time, but with the same SSID. (That is how they are normally set up, but Apple has problems with that).

HTH someone.

Answered by momist on October 30, 2021

The problem was solved by a firmware update. It specifically addressed this password issue.

Answered by Alexander on October 30, 2021

You could try 'Forget this network' in the Airport settings through System Preferences -> Network, then reconnect fresh again

Answered by Nathan Dries on October 30, 2021

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