Q: My macbook pro won't connect to the internet via wifi but does via ethernet. It says the password is wrong although it isn't. ... more
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Sep 30, 2015 7:05 PMby Grant Bennet-Alder,The password in question is the password for your Wi-Fi Network, not your Userid, and not your Apple-ID.
You can discover what is saved in your keychain by using keychain access.app and asking it to reveal the stored password (if there is one).
Do you have other devices that do connect correctly?
Are you sure you are close enough to the Router to get a good signal?
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Oct 1, 2015 4:01 PMby welshcousin,I am using the password for my Wi-Fi Network and I know it's correct. My Kindle Fire connects without problem. I've had intermittent problems recently with the MacBook which I've solved by turning it off and on again until it connects. I downloaded Yosemite on Wednesday and since then it won't connect at all.
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Oct 2, 2015 7:46 AMby Grant Bennet-Alder,There are several situations (connecting to email comes immediately to mind) where 'Not Connecting" is assumed by the Mac to be 'due to Bad Password'.
To test this, get closer to Your Router and see if you can connect under ideal conditions. Then you can debug further.
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Oct 2, 2015 5:02 PMby CMCSK,First contact your ISP. You need to confirm that the issue is not on their end.
Change your router channel. Sometimes this is all you will have to do.
Power cycling the router. Read the router's user manual or contact their tech support for instructions.
System Preferences/Internet & Network/Network
Unlock the padlock
Locations: Automatic
Highlight Airport
Click the Assist Me button
In the popup window click the Diagnostic button.
System Preferences/Network- Unlock padlock. Highlight Airport. Network Name-select your name. Click on the Advanced button. Airport/Preferred Networks-delete all that is not your network.
Place a check mark next to "Remember networks this computer has joined." Click the OK button and lock the padlock. Restart your computer.
http://support.apple.com/kb/TS1920 Mac OS: How to release and renew a DHCP lease
No internet connection (wireless)
Check to see if an extra entry is present in the DNS Tab for your wireless connection (System Preferences/Network/Airport/Advanced/DNS).
Delete all extra entries that you find.
Place a check mark next to "Remember networks this computer has joined."
Other resources to check into:
Configuring 802.1X in Mac OS X Lion and Later
Non-responsive DNS server or invalid DNS configuration can cause long delay before webpages load
How to diagnose and resolve Wi-Fi slow-downs
What Affects Wireless Internet?
Solutions for connecting to the Internet, setting up a small network, and troubleshooting
If using one of Apple's Airport routers, read its user manual or post in its forum area. If using a 3rd party router, read its user manual, contact their tech support department/website or post in its forum area. Another possible solution - read mammothsuziq response
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Oct 2, 2015 8:09 PMby Grant Bennet-Alder,Hold down the Option key while you click on the Wi-Fi Icon in the menuBar. an information display like this will come up:
What Phy Mode and Channel?
What signal strength (RSSI) ?
What Transmit rate?
and possibly most important, how many other networks do you see?
