UniFi – Run the Controller as a Windows service – Ubiquiti Networks Support and Help Center

WiFi QR Code Generator


Ever wanted to create a cool QR code for your guests? But never wanted to type in your WiFi credentials into a form that submits them to a remote webserver to render the QR code? QiFi for the rescue! It will render the code in your browser, on your machine, so the WiFi stays as secure as it was before (read the code if you do not trust text on the internet :-))!

If you use the Save-button to store a code, this is still secure, as the data is stored in HTML5 localStorage and is never transmitted to the server (in contrast to cookie-based solutions).

Don’t trust your browser either? Just pipe the string WIFI:S:<SSID>;T:<WPA|WEP|>;P:<password>;; through the QR code generator of your choice after reading the documentation.

Supported Scanners


Barcode Scanner from ZXing.

Every other Android Barcode Scanner based on the ZXing library.


mbarcode with the mbarcode wifi plugin on Maemo 5.


The iOS Camera App has support for WiFi QR codes since iOS 11.

QR Reader for iPhone from TapMedia and Avira Insight QR Code Scanner by Avira Holding GmbH & Co. KG also support WiFi QR codes. Please note: Due to iOS design, third-party apps cannot modify WiFi settings directly and you’ll have to copy&paste the details. The only alternative would be downloading a mobile profile from the Internet, but that would mean leaking your credentials to a third-party.


Every other QR scanner out there should be able to scan the code too, but probably won’t interpret it as intended. If your scanner supports WiFi QR codes, please send me a mail!

QiFi was written by Evgeni Golov, using jQueryjQuery QRCodejQuery Storage and Twitter Bootstrap.

If you have any comments, suggestions, bugs or complaints: please write to: evgeni+qifi@golov.de.

Fork me on GitHub

Does the Wi-Fi on your Mac keep switching to another network? Here’s the fix!


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Why does my Mac keep switching to another Wi-Fi network? How do I make it stay on my network?

The Mac provides a convenient feature that remembers the Wi-Fi settings of places you’ve connected to in the past. This makes it possible for you to reconnect when you visit a location again without having to go through the sign-in rigmarole.

It can also be a problem if a nearby wireless network you’ve joined in the past is stronger than your own. It can also be a problem when someone in your neighborhood is an XFINITY customer. Your Mac might switch over to the stronger signal, whether you’ve asked it to or not.

You can stop your Mac from switching to a different Wi-Fi network by removing it from your stored settings. You can also stop an XFINITY Wi-Fi network from popping up and asking you to join all of the time. Here’s how.

How to make your Mac forget a Wi-Fi network

You may have saved settings for your neighbors’ wireless network because they helped you out when you first moved in (that’s what happened to me), or you may have switched to a new network but your old one is still hanging around. You should remove them from your stored networks.

  1. Click on the Wi-Fi iconin the upper right corner of your Menu bar.
  2. Select Open Network Preferences…from the dropdown menu.

    Opening Wi-Fi network preferences on Mac

  3. Click on Advanced.
  4. Click on the Wi-Fitab.

    Advanced Wi-Fi settings on Mac

  5. Click on the name of the wireless networkin the Preferred Networks window that your Mac switches to.
  6. Click on the minus (-) button just below the Preferred Networks window.

    Removing a network on Mac

  7. When prompted, click Remove. This will remove the network from your stored settings. 
  8. Click OK
  9. Click Applyand close the window.

    Applying changes to Wi-Fi network on Mac

You can repeat this process for all Wi-Fi networks that you don’t plan on using again in the future. For example, if you stayed at a hotel that you don’t plan on going back to, there is no reason to keep the wireless network stored on your Mac.

How to change the priority of a Wi-Fi network on a Mac

Comcast offers a special service to its XFINITY customers in that they can piggyback onto the shared XFINITY Wi-Fi network without needing a password from just about anywhere. That’s because Comcast’s routers from 2014 on are broadcasting the “xfinitywifi” signal. So, if you have a neighbor with an XFINITY account, your Mac might be trying to connect to it, even if you’ve never had Comcast before in your life.

The thing about XFINITY’s publicly shared Wi-Fi is that it’s everywhere and any time your Mac goes offline, it will pick up on xfinitywifi again, which is why, even when you remove the network, it might still pop up again. Instead, you should move the network to the bottom of the list.

When the xfinitywifi network is at the bottom of the Preferred Network list, your Mac will prioritize your other wireless networks first before trying to join it.

  1. Click on the Wi-Fi iconin the upper right corner of your Menu bar.
  2. Select Open Network Preferences…from the dropdown menu.

    Opening Wi-Fi network preferences on Mac

  3. Click on Advanced.
  4. Click on the Wi-Fitab.

    Advanced Wi-Fi settings on Mac

  5. Click on xfinitywifi.
  6. Drag xfinitywifito the bottom of the list.
  7. Click OK.
  8. Click Applyand close the window.

    Reordering a network in the preferences of Mac

If you are a Comcast customer with an XFINITY network and want to stop broadcasting the xfinitywifi network, follow our instructions here.

Any questions?

Anything else you’d like know about stopping your Mac from switching to another Wi-Fi network? Let us know and we’ll help you out.


Does the Wi-Fi on your Mac keep switching to another network? Here’s the fix!


I wish IOS would let you prioritize wifi networks.

Sent from the iMore App

For a big excision of old WiFi data, deleting one at a time is a drag.

For the removal step, you can also mass select SSID’s, and do a batch delete. Just remember to check the little box in the pop up asking “do for all”.

Something is wrong with the edit and reply feature … Clicking either is blowing up into code…

When i restart my iMac, it doesn’t connect to the default WiFi Network. It doesn’t connect to anything i have to click on my Wifi from the list to connect every time i restart my iMac! Any solutions to that? Yes i did what you mentioned here in the past but it didn’t help.

One other thing I’ve found is that deleting a large number of SSID’s doesn’t always stick. Sometimes, some of them return to the list.

I’ve found that going into the keychain and then sorting by type to show “airport (something- apples way of saying WiFi)” and then deleting them there is also helpful.
Note, there seem to be two lists that you need to do this to, using the upper and lower lists in the sidebar: “iCloud & passwords” and “system & passwords” (these names being from memory as I’m not at my Mac.)
Finally, I’ve found that sometimes one has to delete some SSIDs from a Mac from these 3 locations (config panel once and the both keychain locations twice each) before all unwanted SSIDs are gone. (I don’t know if this is because of low bandwidth reducing the effectiveness of the iCloud sync of these, or impatience, so YMMV.)

Fixing Wi-Fi “Connection Timeout Occurred” Errors on Mac OS X


Fixing Wi-Fi “Connection Timeout Occurred” Errors on Mac OS X

May 14, 2016 – 21 Comments

How to fix for Mac connection timeout error occurredcdn.osxdaily.com/wp-content/uploads/2016/05/mac-connection-timeout-occurred-fix-300×213.jpg 300x” sizes=”(max-width: 467px) 100vw, 467px” style=”padding: 0px; border: 1px solid rgb(255, 255, 255); max-width: 100%; margin: 0px auto !important; display: block !important; float: none !important;” apple-inline=”yes” id=”02290C40-F9EC-4EB8-830F-1845F1786462″ apple-width=”yes” apple-height=”yes” src=”https://o1sen.dk/wp-content/uploads/2016/09/mac-connection-timeout-occurred-fix.jpeg”>

Connecting to wireless networks is pretty much mandatory these days, particularly now that most Macs only have wi-fi cards and no built-in ethernet, and so it can be incredibly frustrating to be unable to join a wi-fi network. Typically when you can’t connect to a particular wi-fi router on a Mac, you’ll see the error message “A connection timeout occurred” or “Failed to join network – a connection timeout occurred” either when trying to join a network or when the Mac is attempting to auto-join a wifi router and it fails. 

If you see that error message, you should be able to resolve the connection timeout issue by following the steps outlined below.

The troubleshooting steps covered here apply to any and all Macs using nearly any version of Mac OS X, whether it’s on a MacBook, MacBook Pro, iMac, Mac Mini, Air, or whatever else you’re using. Note you’re going to be removing wireless networking preferences as part of this sequence, which alone can reliably resolve stubbornly problematic wi-fi issues, but as a side effect you will lose customizations to wireless settings in the process. Thus, if you set custom DNS or specific DHCP or TCP/IP settings, be prepared to make those changes again.

How to Resolve Mac “Connection Timeout” Error Messages with Wi-Fi Networks

Before anything else, you should reboot the wi-fi router that is having a hard time connecting. Sometimes just turning a router off and back on again is sufficient to resolve connection difficulties.

  1. Turn off wi-fi on the Mac by going to the wireless menu and choosing “Turn Wi-Fi Off”
  2. Turn off wificdn.osxdaily.com/wp-content/uploads/2016/05/turn-off-wifi-mac-300×166.jpg 300x” sizes=”(max-width: 438px) 100vw, 438px” style=”padding: 0px; border: 1px solid rgb(255, 255, 255); max-width: 100%; margin: 0px auto !important; display: block !important; float: none !important;” apple-inline=”yes” id=”7A06CEBC-0F45-46DF-AA37-AEF4E292BFA1″ apple-width=”yes” apple-height=”yes” src=”https://o1sen.dk/wp-content/uploads/2016/09/turn-off-wifi-mac.jpeg”>

  3. Eject and disconnect any Thunderbolt or USB drives or disk peripherals that are attached to the computer (I know this sounds weird, just do it)
  4. Disconnect any External Hard Drives temporarily

  5. Next to to the Finder in Mac OS X and create a new folder, call it something like “backup Wi-Fi files” so that it’s easy to identify and put it on the Desktop or another easy to access location
  6. Open a new Finder window, then hit Command+Shift+G to bring up “Go To Folder” (you can also access this from the Go menu), entering the following path:
  7. Go to the Wifi settings folder on Mac

  8. Select the following files in this directory, and copy them to the “backup Wi-Fi files” folder you made in the third step by using drag and drop:
  9. com.apple.airport.preferences.plist



    Copy the wifi files to a backup location

  10. Back at the “SystemConfiguration” folder with the aforementioned files selected, delete those files by dragging them to the Trash (you will need to authenticate to make this change)
  11. Now reboot the Mac as usual by going to the  Apple menu and choosing “Restart”
  12. Restart a Mac

  13. When the Mac boots back up, go to  Apple menu and choose “System Preferences” and select the “Network” preference panel
  14. Choose ‘Wi-Fi’ from the side menu, and click the “Turn Wi-Fi On” button, then pull down the “Locations” menu and choose “Edit Locations”
  15. Click on the + plus button to create a new network location, name it something obvious, then click “Done” and using the Network Name menu item choose to join the wi-fi network as usual
  16. Create a new network locationcdn.osxdaily.com/wp-content/uploads/2016/05/create-new-network-location-300×249.jpg 300x” sizes=”(max-width: 305px) 100vw, 305px” style=”padding: 0px; border: 1px solid rgb(255, 255, 255); max-width: 100%; margin: 0px auto !important; display: block !important; float: none !important;” apple-inline=”yes” id=”666C9D0A-595B-4002-95D8-822B85DE32BE” apple-width=”yes” apple-height=”yes” src=”https://o1sen.dk/wp-content/uploads/2016/09/create-new-network-location.jpeg”>

  17. Authenticate and login to the router as usual, the wifi network connection should establish without incident and without a connection timeout error
  18. Close out of System Preferences (Choose Apply when asked about network settings) and enjoy your wi-fi connection

Wi-fi connection timeout error is fixed and works again on Maccdn.osxdaily.com/wp-content/uploads/2016/05/wifi-connection-timeout-fixed-mac-300×254.jpg 300x, cdn.osxdaily.com/wp-content/uploads/2016/05/wifi-connection-timeout-fixed-mac-610×516.jpg 610x” sizes=”(max-width: 610px) 100vw, 610px” style=”padding: 0px; border: 1px solid rgb(255, 255, 255); max-width: 100%; margin: 0px auto !important; display: block !important; float: none !important;” apple-inline=”yes” id=”637A16DB-46A6-4C9A-BAC7-EC85895E327E” apple-width=”yes” apple-height=”yes” src=”https://o1sen.dk/wp-content/uploads/2016/09/wifi-connection-timeout-fixed-mac.jpeg”>

Once you have established a wi-fi connection, you can reconnect any USB drives, Thunderbolt drives, USB flash disks, or other peripherals back to the Mac again – why this sometimes impacts wi-fi connections is unclear but for whatever reason, perhaps due to a bug, disconnecting them as part of the sequence usually resolves any connection failed and connection timeout issues. 

After the wireless connection is shown to be working as intended, you can trash the ‘backup Wi-Fi files’ folder that was created in this process – the reason we kept those is so that if there is a problem and things are somehow worse (which is incredibly unlikely), you can quickly swap the files back into place again and at least return to the prior point. Of course if you regularly back up your Mac like you should with Time Machine, that’s less of a necessity, but it’s still good practice.

Did this resolve your Mac connection timeout problems? Do you have another trick to fix the issue? Let us know in the comments below.

Enjoy this tip? Subscribe to the OSXDaily newsletter to get more of our great Apple tips, tricks, and important news delivered to your inbox! Enter your email address below:

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Related articles:

Posted by: Paul Horowitz in Mac OS XTips & TricksTroubleshooting


» Comments RSS Feed

  1. Brian says:

    Can we get this rewritten in English? Example follows……….

    “Note you’re going not be removing wireless networking preferences as part of this sequence, that alone can reliably resolve stubbornly problematic wi-fi issue”

    • The King Donald says:

      Brian, you are loser, a total loser, the biggest loser. Ok? A jerk, a loser. Probably the biggest loser jerk there is, ok? This, this is the truth. I’m not making this up folks. I’m not the one who said it, ok? Science, there is science out there, science studies ok? I’m not a scientist, but there are scientists studying this, ok? Probably the best scientists folks, the most beautiful scientists. These scientists, everybody loves them, they’re beautiful. The best science. Ok? And this is what the science says, ok? And they say, the science says that guys like Brian, they are jerks. Total losers. That’s what they say, ok? Not what I’m saying, it’s what the scientists say. They say Brian is a jerk. A real loser jerk. A bigly jerk. Sad!


      Now we, the rest of us, not Brian the Loser, Loser Brian, you ever meet this Loser Brian guy? Forget about him, he’s a jerk. Us, we are going to win this, and we are going to win it bigly. Bigly folks, we are going to win it, bigly. Ok?

      King Donald is here. King Donald is the best, the bestest beautiful best, ever. King Donald is so best that you will be begging King Donald, King Donald please can we be less best sometime? And I’m gonna say no, King Donald is the best and going to be bestly the best. 

      Get out there and vote folks. 

      • Bernard says:

        The scientists need to do a study regarding those who criticise those who criticise grammar…

        Or maybe on those who comment on the need for a study on those …

      • Paul says:

        Please stay on topic (wi-fi troubleshooting), thanks!

      • Charlie says:

        Here in the USA we have a MAJOR PRESIDENTIAL CANDIDATE who talks EXACTLY like this. Many people missed the joke, but that is the joke.

    • Paul says:

      Thanks for catching the typos!

  2. Wharf Xanadu says:

    Very helpful thanks. I reset my router and turn wifi off and on and it usually works. I will use this when it doesn’t. Thanks.

  3. mike says:

    All worked OK but I didn’t get the big thumbs up thing is that OK?

  4. Del says:

    Thanks for such clear instructions. So far, so good, but I can’t find my com.apple.network.identification.plist. Even Spotlight can’t locate it.

  5. Arf says:

    Love your information keep it up. And if ignore little King David he obviously has numerous insecurities and the only way for him to feel BIG is to put everyone else down little David there was s a complex named after you

  6. John G says:

    When did Apple start deleting Ethernet from Macs?
    Just mobile devices like iPads, Air,etc or all Macs?
    First no dvd now no Ethernet! Are they mad?

    • ablonoi says:

      The MacBook Pro require a “Thunderbolt to Ethernet” adapter, the MacBook Air requires a USB to Ethernet adapter, and the MacBook with it’s whopping 1 port total requires a USB-C to Ethernet adapter but then you can’t have the Mac connected to a power source at the same time. How very convenient.

      Can’t wait to see how they hobble the new MacBook Pro in June in just a few weeks, will we get 1 total port? Maybe 2 ports? Wow how generous! How very “Pro!”

    • That weird relative says:

      I’ve heard they also plan to remove floppy drives and parallel ports.

      I won’t be able to save nor print anything anymore.

      Madness, this is madness…

  7. Zoomer547 says:

    Great article. Thanks so much. But I must be doing something wrong. How do I get the big yellow thumbs up?
    I do everything according to the instructions but It’s not telling me that it’s working with a thumbs up?

    • io europa says:

      If your wi-fi is working you did it right. The big yellow thumbs up is emoji attached to the picture to demonstrate the wi-fi is working, it is not a confirmation. It’s photoshop.

      If your wi-fi didn’t have a problem, you don’t need to run through this to begin with.

  8. Edward says:

    This worked for me – although the situ was a little different.
    WiFi connection looked normal and “internet reachable” shown, but no internet connection via any browser on 10.11.5 Knew internet connection from router was ok because IOS/iPad had no problems…
    So followed your procedure. The list of files to copy/delete was not exactly the same but most there or had similar names.
    After reboot, new location etc browsers connected and all worked fine. So maybe this workaround has broader application and fixes other WiFi/internet connection problems.

  9. Francois Lacoursiere says:

    It worked perfectly for me. The WIFI at my GF was so problematic. I kept getting connection timeouts constantly and your procedure totally fixed it up.

    On my side, I did not have the file com.apple.network.identification.plist


  10. Rachel says:

    Sometimes I have trouble with my MacBook connecting to our new house’s WiFi, so I’ll have to make sure I give this a try next time. Thanks for sharing the tips!

  11. Trisha says:

    You are a genius and so kind for posting this. I have been without consistent Internet access ever since I moved into my new roommates home. This worked like a charm thank you thank you thank you!!!!!!!

  12. Urubu says:


Leave a Reply





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How to fix IP address conflicts on your Wi-Fi network


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How to fix IP address conflicts on your Wi-Fi network

By , Apr 15, 2016 

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Every so often, you might end up with two devices on your Wi-Fi network that have the same IP address. This conflict can cause a plethora of problems with trying to use the internet on any of the devices affected.

Fortunately, there’s a really easy to way reset your IP addresses on your iOS devices or Macs, and in this tutorial, we’re going to show you how!

Fixing an IP address conflict in iOS or OS X

IP address conflicts can happen on your computer, no matter what operating system it’s running, as well as your mobile devices. They can be a huge pain in the rear because they can cause your browser to request a website for ages without actually loading anything, and it can cause connectivity issues.

If you’re using an iOS device, and you’re having issues loading web pages or downloading things from the internet even though you have a full internet signal, you may be experiencing an IP address conflict. In this situation, your wireless router will just be too confused to accomplish anything because two devices with the same IP address will be trying to do things on the same network.

This is easily fixed by renewing your DHCP lease, which is a feature built into the Wi-Fi settings. We’ll break this up into two sections for you below; the first for iOS, and the second for your Mac.

Renewing your DHCP lease on your iOS device

We’ll start by showing you how this is done on your iPhone, iPod touch or iPad. Here are the steps:

1) Launch the Settings app from the Home screen and navigate to Wi-Fi.

2) On the right side of your wireless network, tap on the button to bring up the settings for your Wi-Fi network.

Renew lease iOS Wi-Fimedia.idownloadblog.com/wp-content/uploads/2016/04/Renew-lease-iOS-Wi-Fi-500×294.png 500x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-lease-iOS-Wi-Fi-768×452.png 768x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-lease-iOS-Wi-Fi-1024×602.png 1024x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-lease-iOS-Wi-Fi-593×349.png 593x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-lease-iOS-Wi-Fi-220×129.png 220x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-lease-iOS-Wi-Fi-900×529.png 900x” sizes=”(max-width: 593px) 100vw, 593px” style=”padding: 0px; max-width: 100%; display: block; margin-left: auto; margin-right: auto;” apple-inline=”yes” id=”14A5C8DE-53E2-4532-80EC-E76646A7E4DB” apple-width=”yes” apple-height=”yes” src=”https://o1sen.dk/wp-content/uploads/2016/09/Renew-lease-iOS-Wi-Fi.png”>

3) Tap on the blue Renew Lease button at the bottom of the settings pane to reset your device’s IP address and to refresh your connection to the wireless router.

That’s all there is to it! If you had an IP address conflict, this will have solved the issue and your websites and other internet business should start to load properly again.

Renewing your DHCP lease on your Mac

Just like on your iOS devices, your IP address can become a conflicted one even on your expensive Mac. Fortunately, it too comes with a similar function from its Wi-Fi settings. Here are the steps to renew your DHCP lease on your Mac:

1) Launch the System Preferences app on your Mac and open the Network preferences pane.

Renew DHCP Lease on Mac Network Preferences panemedia.idownloadblog.com/wp-content/uploads/2016/04/Renew-DHCP-Lease-on-Mac-Network-Preferences-pane-447×400.png 447x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-DHCP-Lease-on-Mac-Network-Preferences-pane-768×688.png 768x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-DHCP-Lease-on-Mac-Network-Preferences-pane-1024×917.png 1024x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-DHCP-Lease-on-Mac-Network-Preferences-pane-593×531.png 593x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-DHCP-Lease-on-Mac-Network-Preferences-pane-220×197.png 220x, media.idownloadblog.com/wp-content/uploads/2016/04/Renew-DHCP-Lease-on-Mac-Network-Preferences-pane-900×806.png 900x” sizes=”(max-width: 593px) 100vw, 593px” style=”padding: 0px; max-width: 100%; display: block; margin-left: auto; margin-right: auto;” apple-inline=”yes” id=”1A085DB4-3105-4852-BB77-ADFB3B4C46E3″ apple-width=”yes” apple-height=”yes” src=”https://o1sen.dk/wp-content/uploads/2016/09/Renew-DHCP-Lease-on-Mac-Network-Preferences-pane.png”>

2) Now, make sure you have Wi-Fi selected on the left side of the preferences pane and you’ll click on the Advanced button at the bottom right of the window.

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3) In the next window, click on the TCP/IP tab and then click on the Renew DHCP Lease button on the right side of the preferences pane.

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That’s all there is to renewing your DHCP lease on your Mac. Your Mac will now acquire a new IP address and reconnect to the wireless network. You should then be able to resume your typical web activities without any issues.


It’s not very often that your wireless router will goof up and assign multiple devices the same IP address, but it happens on occasion, and it’s happened to me many times in the past. Fortunately, this key piece of information will give you the power to put an end to it whenever it happens to you.

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