Why does my MacBookPro not see the WiFi signal?

When I open up my MacBookPro in the room where the WiFi transmitter is located it will not connect with it. When inspecting the networks list I notice that my own network is not listed. When the name of the home network does appear trying to connect with it will lead to a timeout error.
When I take the computer upstairs (3rd level, 20 meters away from the WiFi box and have two solid concrete floors between it) the network will be recognized and connected to right away.
Windows 7 computers, the iPad, an IPodtouch, and 4 smartphones of diverse brands do not have this problem. My other Macbook with osx 10.6 has the same problem.
Anybody solved this?

Try the following on your MBP, in order, until (hopefully) resolved:
1a. Delete Preferred Network(s)
System Preferences > Network > Wi-Fi > Advanced > Wi-Fi tab
Under "Preferred Networks," delete the network(s) you regularly use from the list.
1b. Delete AirPort Keychain Entries
Launch the "Keychain Access" application located in Applications/Utilties.
In the windows on the left side: Select login for Keychains and "All Items" for Category.
Click on the "Kind" filter at the top, and look for any "AirPort network password" entries...and delete them.
1c. Add Preferred Network(s)
System Preferences > Network > Wi-Fi > Advanced > Wi-Fi tab
Add the preferred network(s) using the "+" button.
Restart or log out then back in.
2. Move System Configuration Files
(Note: You will have to reestablish your network connections settings.)
Go to /Library/Preferences
Move the SystemConfiguration folder to the desktop.
Restart your Mac. (Note: OS X will rebuild the files that are now sitting on your desktop. If this doesn't resolve the issue, you can move the folder back to it's original location.)

Similar Messages

  • TS1398 Why does my iPad2 not display the WiFi icon?

    Why does my iPad2 not display the WiFi icon? I have implemented ALL of the troubleshooting tips, but my WiFi icon is still missing, and it will NOT recognize the internet connection that I know to work on my computer and iPhone.

    Try the following:
    1. Reset the AirPlay devices
    2. Reboot the router
    3. Reboot the iPad
    Note: The AirPlay icon is now in the Control Center

  • HT3986 I installed windows 7 successfull, but when I start the mac in windows I does not see the wifi, and others things. How do I get the drivers?

    I installed windows 7 successfull, but when I start the mac in windows I does not see the wifi, and others things. How do I get the drivers?
    I remember that with Snow Leopard you could download them from the Apple website.
    Cheers!

    Read the Boot Camp Documentation while you run Boot Camp Assistant to download the Windows Support Software which was the first step in the Boot Camp Setup procedure.

  • [solved] NetworkManager does not see the wifi channel 13

    Hello!
    I have a problem that NetworkManager did not see the wifi network, which broadcasts on channel 13. How to install the drivers for the network to be visible?
    Last edited by ghsaehas (2015-01-18 16:57:39)

    Install and configure crda:
    https://www.archlinux.org/packages/core/x86_64/crda/
    http://wireless.kernel.org/en/developer … atory/CRDA

  • Why does my image not reach the edges of the page when printed, but appears fine as pdf?

    Why does my image not reach the edges of the page when printed, but appears fine as pdf?

    Check a printable area of your printer.
    Make a (grey) rectangle that is larger than the paper size. Print it,
    you'll get a message that some cropping will occur, that's okay. Then take a
    ruler and measure the dimensions of the rectangle printed on the paper or
    the white borders around the printed rectangle.

  • I have a new HP Officejet 6500A plus.  I cannot get it to connect to            my Airport Extreme V5.6.  It see the wifi signal but Fails on "Filtering" and possibly the channel.  Does anyone know how to reset or reconfigure filtering

    I have a new HP Officejet 6500A plus.  I cannot get it to connect to my Airport Extreme V5.6.  It see the wifi signal but Fails on "Filtering" and possibly the channel.  Does anyone know how to reset or reconfigure filtering and channel on the old airports?

    This is a part of the larger MacBook Pro connectivity issue. There are several related threads dealing with the MBP's networking problems. If your unit is suffering from this type of difficulty, good luck ... (or a long ethernet cable)
    (PS Everybody please make noise on this one so apple comes up with a solution.)
    < Edited by Host >

  • Any reason why my MacBook Pro keeps dropping the WiFi signal - will be fine for ages and then just drops it!, Any reason why my MacBook Pro keeps dropping the WiFi signal - will be fine for ages and then just drops it!

    Any reason why my MacBook Pro keeps dropping the WiFi signal - will be fine for ages and then just drops it! Does it at home and work so not either broadband connection

    jp270759 wrote:
    Hi. MAny thanks for the answer. Am new to Apple - what's the "real" MacBook Pro forum?
    I would like to know also!
    For your issue - Solution may be found if you search in the "More Like This" section over in the right column.
    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:
    Troubleshooting Wi-Fi issues in OS X Lion and Mac OS X v10.6
    Netspot
    How to diagnose and resolve Wi-Fi slow-downs
    Pv6 troubleshooting
    Mac OS X 10.6 Help:  Solving problems with connecting to the Internet
    What Affects Wireless Internet?
    Solutions for connecting to the Internet, setting up a small network, and troubleshooting

  • I have changed to AT&T U-verse, which has a new modem and router combined.  Safari 5.1.10 will not recognize the wifi signal, but Foxfire will.  What settings do I need to change on Safari?

    I have changed to AT&T U-verse, which has a new modem and router combined.  Safari 5.1.10 will not recognize the wifi signal, but Foxfire will.  What settings do I need to change on Safari?

    Hello SalsburgD
    The first thing I would check is to make sure that the router is using the recommended settings to get online. Another troubleshooting step is to create a new Network Location and then join your network to see if that changes things. 
    iOS and OS X: Recommended settings for Wi-Fi routers and access points
    http://support.apple.com/kb/HT4199
    Using network locations (Mac OS X v10.6 and later)
    http://support.apple.com/kb/ht5289
    Regards,
    -Norm G.

  • Why does my iPad often lose the Wifi connection?

    Hello all -
    Often when I am using my iPad at home (which is where i use it 95% of time), the WiFi connection will simply disappear - sometimes every 2 minutes of so.  Sometimes, when I pull up the "Utility" screen from the bottom (sorry, don't know the correct name), and then unclick the WiFi connection, wait a few seconds, and turn it back on - the connection comes back.  But that probably only works 10-30% of the time.
    The way I can always make it come back is to go to the Settings app, click on Wifi, where it shows no connection.  Then if I turn on WiFi, after a couple of seconds I see my network appear under the "Choose a Network..." section, and then a few seconds later, see it appear in the top section.
    Does anybody know why this might be happening and what I can do to fix it?
    Thanks.

    Some things to try first:
    1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
    2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
    3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at
    http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
    4. Go into your router security settings and change from WEP to WPA with AES.
    5.  Renew IP Address: (especially if you are drooping internet connection)
        •    Launch Settings app
        •    Tap on Wi-Fi
        •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
        •    In the window that opens, tap on the Renew Lease button
    6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
    http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
    ~~~~~~~~~~~~~~~~~~~~~~~~~
    Fix WiFi Issue for iOS 7
    http://ipadnerds.com/fix-wifi-issue-ios-7/
    iOS 6 Wifi Problems/Fixes
    Wi-Fi Fix for iOS 6
    https://discussions.apple.com/thread/4823738?tstart=240
    How To: Workaround iPad Wi-Fi Issues
    http://www.theipadfan.com/workaround-ipad-wifi-issues/
    Another Fix For iOS 6 WiFi Problems
    http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
    Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
    Fix For iOS 6 WiFi Problems?
    http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
    Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
    http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
    How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
    http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
    iOS 6 iPad 3 wi-fi "connection fix" for netgear router
    http://www.youtube.com/watch?v=XsWS4ha-dn0
    Apple's iOS 6 Wi-Fi problems
    http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
    ~~~~~~~~~~~~~~~~~~~~~~~
    iPad: Issues connecting to Wi-Fi networks
    http://support.apple.com/kb/ts3304
    How to Boost Your Wi-Fi Signal
    http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.hmL
    Troubleshooting a Weak Wi-Fi Signal
    http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Signal.htm
    How to Fix a Poor Wi-Fi Signal on Your iPad
    http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
    iOS Troubleshooting Wi-Fi networks and connections  http://support.apple.com/kb/TS1398
    iPad: Issues connecting to Wi-Fi networks  http://support.apple.com/kb/ts3304
    WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
    How to Fix: My iPad Won't Connect to WiFi
    http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
    iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
    iOS: Recommended settings for Wi-Fi routers and access points  http://support.apple.com/kb/HT4199
    How to Quickly Fix iPad 3 Wi-Fi Reception Problems
    http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
    iPad Wi-Fi Problems: Comprehensive List of Fixes
    http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
    Connect iPad to Wi-Fi (with troubleshooting info)
    http://thehowto.wikidot.com/wifi-connect-ipad
    10 Ways to Boost Your Wireless Signal
    http://www.pcmag.com/article2/0,2817,2372811,00.asp
    Fix iPad Wifi Connection and Signal Issues  http://www.youtube.com/watch?v=uwWtIG5jUxE
    Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
    How to Change Your iPhone’s (iPad’s) DNS Servers
    http://www.macinstruct.com/node/558
    How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
    Unable to Connect After iOS Update - saw this solution on another post.
    https://discussions.apple.com/thread/4010130
    Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
    Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
    You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
    Wi-Fi or Bluetooth settings grayed out or dim
    http://support.apple.com/kb/TS1559
    ~~~~~~~~~~~~~~~
    If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
     Cheers, Tom

  • Why does my iPad keep losing the wifi every few minutes?

    Why does my iPad keep losing the wireless connection every few minutes?

    Could be
    1 the routers firmware require an Update
    2 the iPad is defect

  • Why does Time Machine not work over wifi but only via ethernet cable ?

    Hi everyone,
    It's been some time I have this problem now.
    The first time I backed up my mac within Time Capsule with time machine, I chose to use the ethernet cable because the gigabit connection is much faster than the wifi for the first back up, but now, any time I want to update this back up, I need to connect the cable, cause "Time Machine can not connect to the Drive I picked" over wifi.
    This is so annoying. Does anyone have a similar issue ?
    Any solution ?
    When I got this "error" I can use Utility Airport and get full access to the drive, even in finder. The only thing that doesn't work is TimeMachine connecting to the drive, even if it is detected by TimeMachine itself.
    Thanks.
    Riccardo

    Typical Yosemite.
    I suggest a full reconfigure of the TC.
    Follow this list..
    No files are deleted on the TC doing this although you might have to repoint your laptop to the backup.
    Note.. even if TM does connect it will say it is going to do a new backup.. it is only when it starts that it discovers the backup exists and increments it.
    Start from a factory reset. No files are lost on the hard disk doing this.
    Factory reset universal
    Power off the TC.. ie pull the power cord or power off at the wall.. wait 10sec.. hold in the reset button.. be gentle.. power on again still holding in reset.. and keep holding it in for another 10sec. You may need some help as it is hard to both hold in reset and apply power. It will show success by rapidly blinking the front led. Release the reset.. and wait a couple of min for the TC to reset and come back with factory settings. If the front LED doesn’t blink rapidly you missed it and simply try again. The reset is fairly fragile in these.. press it so you feel it just click and no more.. I have seen people bend the lever or even break it. I use a toothpick as tool.
    N.B. None of your files on the hard disk of the TC are deleted.. this simply clears out the router settings of the TC.
    Setup the TC again.
    Then redo the setup from the computer with Yosemite.
    1. Use very short names.. NOT APPLE RECOMMENDED names. No spaces and pure alphanumerics.
    eg TCgen5 for basestation and and TCwifi wireless name.
    If the issue is wireless use TC24ghz and TC5ghz with fixed channels as this also seems to help stop the nonsense. But this can be tried in the second round. ie plan on a first and second round of changes to fix this.. hopefully.. I will point out other steps that can be round2.
    2. Use all passwords that also comply with 1. but can be a bit longer. ie 8-20 characters mixed case and numbers.. no non-alphanumerics.
    3. If the TC is main router you can skip this point. This is only an issue when the TC is bridged.
    Ensure the TC always takes the same IP address.. you will need to do this on the main router using dhcp reservation.. or a bit more complex setup using static IP in the TC. But this is important.. having IP drift all over the place when Yosemite cannot remember its own name for 5 min after a reboot makes for poor networking.
    4. Check your share name on the computer is not changing.. make sure it also complies with the above.. short no spaces and pure alphanumeric.. but this change will mess up your TM backup.. so be prepared to do a new full backup. Sorry.. keep this one for second round if you want to avoid a new backup.
    5. Mount the TC disk in the computer manually.
    In Finder, Go, Connect to server from the top menu,
    Type in SMB://192.168.0.254 (or whatever the TC ip is which you have now made static. As a router by default it is 10.0.1.1 and I encourage people to stick with that unless you know what you are doing).
    You can use name.. SMB://TCgen5.local where you replace TCgen5 with your TC name.. local is the default domain of the TC and doesn't change.
    However names are not so easy as IP address.. nor as reliable. At least not in Yosemite they aren't. The domain can also be an issue if you are not plugged or wireless directly to the TC.
    6. Make sure IPv6 is set to link-local only in the computer. For example wireless open the network preferences, wireless and advanced / TCP/IP.. and fix the IPv6. to link-local only. Do the same for ethernet if you use it.
    There is a lot more jiggery pokery you can try but the above is a good start.. if you find it still unreliable.. don't be surprised.
    You might need to do some more work on the computer itself. eg Reset the PRAM.. has helped some people. Clean install of the OS is also helpful if you upgrade installed.
    Tell us how you go.
    Someone posted a solution.. See this thread.
    Macbook can't find Time Capsule anymore
    Start from the bottom and work up.. I have a list of good network practice changes but I have avoided Yosemites bug heaven.
    Yosemite has serious DNS bug in the networking application.. here is the lets say more arcane method of fixing it by doing a network transplant from mavericks.
    http://arstechnica.com/apple/2015/01/why-dns-in-os-x-10-10-is-broken-and-what-yo u-can-do-to-fix-it/

  • Why does Image Capture not see my scanners?

    I have two multi-function printers - a Canon MF4350d and a HP Officejet J4550 - both connected to my iMac and both printing properly. But when
    I open Image Capture it does not see either device. How do I get my scanners functional?

    Check this thread: https://discussions.apple.com/thread/5540452?start=0&tstart=0
    It would seem there are updated drivers for (some) HP scanners.  Doesn't appear to be the case for Canon.

  • Why does my Macbook not choose the 5Ghz network?

    Hi there! Can anyone tell me why, if I have a dual band simultaneous Airport Extreme and iStumbler says I have a 58% 5 bar 5Ghz on channel 100 signal right at the top of the list of available networks and the other examples from my network are 45% and 42% on the 2.4Ghz band - then why does my Macbook insist on choosing one of the lesser signal strength networks to log in to? I am extending my network via an Airport Express in the bedroom and I think it is that which is showing the highest signal (probably as it it considerably closer than the Extreme where I am sat right now!). Just wondered, doesn't seem very dual band to me if it never connects to the better band? Don't want to force it to connect to 5Ghz as that's not required, at the moment it chooses.

    Chances are that the extended network is using the 2.4 GHz radio band as this band allows for greater range. Remember that the AirPort Express can only operate in one band or the other. It is not a simultaneously dual-band device like your Extreme.

  • Why does my iMac disconnect from the wifi when it goes to sleep?

    Everytime my iMac (Early 2008) running mountain lion goes to sleep it disconnects from the wifi (I only have wifi available) I then get a 'the browser does not support the :File extension)
    I'm stuck please help....

    Hi Matt,
    This has worked for a few...
    Make a New Location, Using network locations in Mac OS X ...
    http://support.apple.com/kb/HT2712
    10.7 & 10.8…
    System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
    10.5.x/10.6.x/10.7.x instructions...
    System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
    The interface that connects to the Internet should be dragged to the top of the list.
    Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
    For 10.5/10.6, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
    208.67.222.222
    208.67.220.220
    Click OK.

  • Why does Firefox SOMETIMES not show the AVG toolbar

    I have Firefox 14.0.1 and when I open it SOMETIMES the AVG toolbar is not there but sometimes it is. When it is not there the space for it to be in is there but nothing is in it. This happens often and I have to open another Firefox screen and go on doing so until one with the AVG toolbar appears

    Do you need the AVG toolbar? Some people have reported that it causes problems with Firefox.

Maybe you are looking for

  • IPhoto for Mac problems

    Since I installed the last update to OS X, iPhoto is running so slow that I can not even stand to use it! This problem started in May. I do have 36K photos in my library - but this never ending spinning ball started out of the blue the first time I l

  • Converting RAW files to JPEG on import?

    Is this possible? I normally shoot RAW, but I've got about 100 shots on my card which I just need JPEGs for. I was just wondering if it was possible to convert them on import rather than import as RAW then convert to JPEG...?

  • VL32- Post Goods receipt

    Hi, How to deactivate Post Goods Receipt tab in VL32 without using user exits or field exits? Regrads, Prashanth

  • How do I import iphoto albums from one mac to a newer mac

    Hello, I have a brand new mac air with iphoto 11. I have multiple albums on my old macbook pro and old iphoto. I have been able to copy over the photos but the new iphoto will not recognise my albums. My iphone has the albums on it also. would apprec

  • HP Mini Password reset needed

    My HP Mini 1137NA needs a magic password reset - fails with CNU9202WQJ This question was solved. View Solution.