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MacBook Pro Wi-Fi Problem

2994 Views 3 Replies Latest reply: Jun 8, 2013 3:33 AM by Agney Patel RSS
OnatK61 Level 1 Level 1 (0 points)
Currently Being Moderated
Jun 8, 2013 3:19 AM

My MacBook Pro doesn't connect to the Wi-Fi although I try some different DNS adresses. What should I do?

 

P.S: I can connect to the internet with Ethernet.

MacBook Pro, OS X Mountain Lion (10.8.3)
  • Agney Patel Level 1 Level 1 (120 points)
    Currently Being Moderated
    Jun 8, 2013 3:22 AM (in response to OnatK61)

    Mac Wireless & Airport Connection Problem Troubleshooting: The Basics

    * Turn Airport on & off – You can do this via the Airport menu bar or from the Network Preferences. This is the first thing you should try when troubleshooting Mac wireless problems.

     

    * Reset your router – This is the second thing you should try doing. You can fix a surprising amount of wireless problems just by resetting the airport/router. All you need to do is turn the thing off for a few seconds and turn it back on.

     

    * Reset your Cable/DSL modem – You’ll usually want to reset this in combination with your wireless router. Reset this first so the DHCP information will be pulled to the wireless router properly.

     

    * Change Wireless Channels – sometimes your router’s wireless broadcast channel will interfere with a neighbors, be sure you have your router set to a unique channel. Even if it’s a weak signal there can still be interference.

     

    * Make sure Wireless/Airport card software & firmware is up to date – This is usually done just by going to the Software Update menu, if there are any updates available for your Mac or Airport, install them.

     

    Mac Wireless Troubleshooting: Intermediate

    * Change wireless security protocol – You shouldn’t be using WEP anyway for security reasons, but sometimes changing from WEP to WPA/WPA2 or WPA to WPA2 can resolve wireless connection difficulties.

     

    * Make sure router firmware is up to date – Check your router manufacturers website for firmware updates, if there are any available, install them.

     

    * Delete and recreate connection – Try deleting and recreating/reestablishing the wireless connection, sometimes a setting can be corrupted and this may fix it.

     

    * Create a new Network Location – Similar to the above suggestion, try creating a new and different wireless network location to see if it resolves the connection problems.

     

    * Change DHCP auto settings to manual – sometimes there is a problem with the DHCP server, and if you manually set an IP address on the network you can be fine. Remember to set the IP to a high number so it wouldn’t interfere with other DHCP machines. As long as you have the subnet mask, router, and DNS settings configured manually as well, this shouldn’t be a problem.

     

    * Disable “Wireless G/N/B only” mode – Sometimes a setting is selected that only broadcasts your wireless signal in Wireless B, G, or N mode (depending on the routers abilities). If this is set, try disabling it.

     

    * Flush the DNS cache – Launch the Terminal and enter the following command onto one full line within the Terminal: dscacheutil -flushcache

     

    Mac Wireless Connection Problem Troubleshooting: Advanced

    * Zap the PRAM – Reboot your Mac and hold Command+Option+P+R during restart until you hear another chime, let the Mac boot as usual.

     

    * Delete Wireless Config files – Delete com.apple.internetconfigpriv.plist and com.apple.internetconfig.plist files from ~/Library/Preferences and reboot

     

    * Trash your home directories SystemConfiguration – Remove all files within ~/Library/Preferences/SystemConfiguration/ and then reboot your Mac.

     

    * Reset your Mac’s System Management Controller (SMC) – For MacBook and MacBook Pro’s: Shutdown the MacBook/Pro, remove the battery, disconnect the power, hold the Power Key for 15 seconds. Replace the battery, reconnect power, and zap the PRAM and wait for 2 chimes before letting the keys go. Let boot as usual.

     

    Refer to http://support.apple.com/kb/HT1126

  • Agney Patel Level 1 Level 1 (120 points)
    Currently Being Moderated
    Jun 8, 2013 3:33 AM (in response to OnatK61)

    You are Welcome !
    Thank you for being here at Apple Support Communities.

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