Wifi doesn't work after Yosemite upgrade

I upgraded to Yosemite. Now Wifi connects and immediately disconnects. Chatted with support and none of the proposed fixes work.

See http://forums.macrumors.com/showthread.php?t=1802327

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You need http://support.apple.com/kb/DL1572
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M3800 Developer Edition: wifi doesn't work after sleep

I have an M3800 Developer Edition (2015 model). Ubuntu is factory-installed 14.04, with hardware enablement stack installed. Recently (past 1-2 weeks) wifi doesn't work after sleep (lid closed or open doesn't matter), and only rebooting gets in back. Tried rmmod and modprobe with no success. Has anyone else seen this, and/or are you aware of any open bug(s) for this?
Relevant ouput:
lsmod when problem exists:
iwlmvm                217725 0
mac80211              652718 1 iwlmvm
iwlwifi               179412 1 iwlmvm
cfg80211              494362 3 iwlwifi,mac80211,iwlmvm
rfkill list when problem exists:
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
3: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
rmmod the above, then modprobe iwlwifi. Does not fix problem, only rebooting does:
May 4 08:23:14 jonathan-m3800 kernel: [69089.189614] cfg80211: Calling CRDA to update world regulatory domain
May 4 08:23:14 jonathan-m3800 kernel: [69089.192181] cfg80211: World regulatory domain updated:
May 4 08:23:14 jonathan-m3800 kernel: [69089.192184] cfg80211: DFS Master region: unset
May 4 08:23:14 jonathan-m3800 kernel: [69089.192185] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
May 4 08:23:14 jonathan-m3800 kernel: [69089.192187] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
May 4 08:23:14 jonathan-m3800 kernel: [69089.192188] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
May 4 08:23:14 jonathan-m3800 kernel: [69089.192189] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
May 4 08:23:14 jonathan-m3800 kernel: [69089.192190] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
May 4 08:23:14 jonathan-m3800 kernel: [69089.192191] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
May 4 08:23:14 jonathan-m3800 kernel: [69089.204141] Intel(R) Wireless WiFi driver for Linux, in-tree:
May 4 08:23:14 jonathan-m3800 kernel: [69089.204143] Copyright(c) 2003- 2014 Intel Corporation
May 4 08:23:14 jonathan-m3800 kernel: [69089.204414] iwlwifi 0000:06:00.0: irq 48 for MSI/MSI-X
May 4 08:23:14 jonathan-m3800 kernel: [69089.204904] iwlwifi 0000:06:00.0: loaded firmware version 25.228.9.0 op_mode iwlmvm
May 4 08:23:14 jonathan-m3800 kernel: [69089.207709] iwlwifi 0000:06:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144
May 4 08:23:14 jonathan-m3800 kernel: [69089.207790] iwlwifi 0000:06:00.0: L1 Enabled - LTR Enabled
May 4 08:23:14 jonathan-m3800 kernel: [69089.208150] iwlwifi 0000:06:00.0: L1 Enabled - LTR Enabled
May 4 08:23:14 jonathan-m3800 kernel: [69089.392408] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
May 4 08:23:14 jonathan-m3800 NetworkManager[901]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1c.2/0000:06:00.0/net/wlan0, iface: wlan0)
May 4 08:23:14 jonathan-m3800 NetworkManager[901]:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1c.2/0000:06:00.0/net/wlan0, iface: wlan0): no ifupdown configuration found.
May 4 08:23:14 jonathan-m3800 NetworkManager[901]: <info> (wlan0): using nl80211 for WiFi device control
May 4 08:23:14 jonathan-m3800 NetworkManager[901]: <info> (wlan0): driver supports Access Point (AP) mode
May 4 08:23:14 jonathan-m3800 NetworkManager[901]: <info> (wlan0): new 802.11 WiFi device (driver: 'iwlwifi' ifindex: 4)
May 4 08:23:14 jonathan-m3800 NetworkManager[901]: <info> (wlan0): exported as /org/freedesktop/NetworkManager/Devices/2
May 4 08:23:14 jonathan-m3800 NetworkManager[901]: <info> rfkill5: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:1c.2/0000:06:00.0/ieee80211/phy0/rfkill5) (driver iwlwifi)
May 4 08:23:16 jonathan-m3800 ModemManager[852]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.2/0000:06:00.0': not supported by any plugin
lspci:
06:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b)
After reboot:
lsmod |grep -i iwl:
iwlmvm                217725 0
mac80211              652718 1 iwlmvm
iwlwifi               179412 1 iwlmvm
cfg80211              494362 3 iwlwifi,mac80211,iwlmvm
rfkill list after reboot:
0: nfc0: NFC
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
2: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no

Wi-Fi still not reconnecting after sleep
http://forums.macrumors.com/showthread.php?t=1229591

Wifi doesn't work after screen replacement

My husband was gracious enough to replace the screen on my ipad 2. However, now, I can't connect to wifi unless I'm right next to the router.The antenna needs alot of signal to see any network. He verified the antenna isn't broken. Any ideas on how to fix this problem?

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 droping 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/
~~~~~~~~~~~~~~~~~~~~~~~~~
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/
~~~~~~~~~~~~~~~~~~~~~~~
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.h tm
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Sig nal.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
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 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.
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

Share option for email does not work after Yosemite upgrade.

Hi,
Does anybody know why the share option, "Share via email" does not work anymore after Yosemite upgrade? I love this feature. It's just quick and easy.
Rod.

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HT1338 motion 4 will not work after yosemite upgrade

motion 4 will not work after yosemite upgrade

To be honest I do not use motion or any other compositing app so i do not miss it personally. However the new Motion is not that expensive, around $60 i think. Still, I understand your frustration.
I am afraid the more the OS is updated the less compatible certain applications will become.
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Wifi doesn't work after sleep

I'm having an issue where my wifi will stop working after sleep. This isn't the same problem where the network had to be manually reconnected--
The "radar" will be grayed out, and I can see the networks if I click on it, but I cannot reconnect, disable wifi (make the radar the pie shape). The only thing I can do is do a hard reset holding the power button until the computer shuts off.
In fact, if I select 'Apple -> Restart,' nothing happens. I have to hold the power button down.
Any thoughts?

Wi-Fi still not reconnecting after sleep
http://forums.macrumors.com/showthread.php?t=1229591

WiFi doesn't work after repair

Hi,
Today I received my iMac 27" back from repair. It had the screen and the optical drive replaced since both were defect.
According to the papers, nothing else has been replaced, but WiFi doesn't work now. I can't connect to my own network (Time Capsule), and only very few networks show up in the list -- quite often, mine is not there, and sometimes there are none at all. Checking with a laptop right next to the iMac, I can see plenty of networks (and my own network works fine).
Could the Apple guys accidentally have screwed up something? I thought about looking at the antenna connectors on the AirPort card (a guide is available on iFixIt), but it seems quite complicated (and I don't have the necessary screwdrivers).
Thanks,
Michael

And if it under warranty you do not want to open it up and void your warranty.
When the authorized tech installed new memory modules in my 09 Mac mini, he shorted out my wireless card and they had to order a new one and install it. I would take it back and have them figure out what is wrong.

HT4528 iPhone 4s' wifi doesn't work after upgrading to iOS 7

My Verizon iPhone 4s will not connect to wifi after upgrading to iOS 7. You would think Apple would have figured this problem out before releasing iOS 7 to the public. Any fixes?

After having trying everything out on the web, I found a fix that worked out. The thing to do is to deactivate your phone and then reactivate it. The way to do it is to first power off the phone. Then take out the SIM card. Then power on the phone and make an emergency call for about 5 sec. Turn the power off. Place the SIM card back into the phone. Power on the phone and plug it into the computer and to itune. Itune will then ask for your user name and password. The wifi will be working.
All you have to do then, is reinstall your saved restored file.
That's it !!

Thunderbolt Network Adapter not working after yosemite upgrade

After I upgraded to Yosemite, my MBP Retina 13" doesn't see the link on thunderbolt network adapter. The wireless is totally unreliable and freeze every few min for 1-2 min which is long enough to disconnect any sessions. Turn off and on of wireless works and recovers but it's royal pain. Any suggestions?
I scheduled call with Apple 3 times today. They call me back at the scheduled time and immediately tell me that I missed their call even though I pickup on 1st ring. Been waiting in their support queue for more than 30 min now and no one is on line yet.

the link provide above leads to http://plugable.com/2014/10/31/os-x-10-10-yosemite-ethernet-adapter-problems-we- can-help
...but these seem to be all 3rd party USB ethernet adapters and nothing to do with the Thunderbolt adapter of the thread - or am I missing something?
I have the same blooming problem, it seems to be totally hit and miss whether the adapter works or not.
I thought is was a faulty adapter, so even bought a second one for my MacBook Pro, so a bit more profit for the most profitable company in the world for a non working device. My ethernet cable works fine to an old apple USB adapter but is 90% useless with Thunderbolt.
Renewing the DHCP lease occasionally works, but totally unreliable, at the moment it fails.
Still looking for a reliable solution.
Come on Apple, please sort this out, you have a connector policy of turning everything you can into adapters and dongles rather than building them in, so you end up with a slim laptop and a bag of adapters to carry around, and then when they don't even work - doubly annoying.

FaceTime Camera Not Working After Yosemite Upgrade

So After I upgraded to Yosemite yesterday, my FaceTime Camera stopped working.
Every time I turned on FaceTime or Photo Booth, the green light on the camera started to blink like crazy but nothing would show up on the screen. It was just black. And I tried different user too, not working.
I tried to reinstall Yosemite, no luck.
Tried to rest SMC and PRAM, no luck.
Tried safe boot, no camera in safe mode.
Tried repair disk permission, no luck.
Here is how it showed in system report, I thought it would be more details?
I am using MBP with Retina late 2013 model. I am 90% positive that the camera was working before this upgrade.
I don't know whether anyone else encounter the same problem and I am afraid it's something I installed that's causing the problem. In that case, even a clean install works fine, after I restore everything from Time Machine, the problem might just come back.
Thanks!
<Image Edited By Host>

geoffreysong wrote: ... I am afraid it's something I installed that's causing the problem...
You have done the right things. With all you have tried, some third party item you have added is a very good guess as to what could be causing your trouble. The biggest difficulty will be determining which installation caused the trouble.
I am certainly not experiencing your problem on any of my 10.10 Macs.
geoffreysong wrote: ... In that case, even a clean install works fine, after I restore everything from Time Machine, the problem might just come back...
Right again! The way to prevent reinstalling the problem (and to prove your guess was correct) is to reinstall OS X using the OS X Yosemite: Erase and reinstall OS X instructions.
Next, before adding anything else, test your camera using the applicable suggestions from Apple's How to Troubleshoot iSight article. (Over time, Apple has changed the built-in camera's name on newer Macs from "iSight" to "FaceTime" and then to "FaceTime HD." Regardless of the name of your Mac's built-in camera, the same info and troubleshooting applies.)
• If the camera works now, your suspicion is correct. You can then add ONE needed app FROM ITS ORIGINAL SOURCE (not from any of your backups) and test the camera again. If the camera fails, you have found the problem app. If the camera works, continue adding apps one at a time, testing thoroughly between each addition. After all your apps are added back, if your camera continues to work correctly, you can copy your data files back from your latest backup.
• If the camera doesn't work immediately when nothing has been added to your fresh Mac OS X installation, you most likely have a hardware problem. There are no user serviceable parts of the camera. Contact Apple or an Apple-Authorized Service Provider for service.
Message was edited by: EZ Jim
Mac OSX 10.10.1

Scrapbook and Snapshots screensavers no longer work after Yosemite upgrade

Upgraded to Yosemite and discovered that the Scrapbook and Snapshots screensaver modules don't work now. Here's how they appear in my screensaver preference pane:
The Scrapbook screensaver doesn't work at all; the Snapshots screensaver will load but isn't fully functional - it only displays a single photo at a time, it doesn't show the background photos any more. Snapshots was my preferred screensaver too. Any thoughts besides a clean reinstallation of Yosemite?
MacBook Pro (Retina, 13-inch, Late 2013)
2.6 GHz Intel Core i5
16 GB 1600 MHz DDR3
500 GB Flash storage
Intel Iris 1536 MB

I saw, from a clean install of Yosemite of a friend, that these two screensavers are not there.
Probably I have brought them back from Snow Leopard.
I would like to remove them from the list of screensaver (or recharge the list of default screensaver), you know if it is possible and how?
I thought I would delete the file screensaver.plist, but I would not combine damage.
Thank you and hello

Incoming mailserver won`t work after Yosemite upgrade

My incoming emailserver (pop.online.no) suddenly stopped working after upgrading to OS X Yosemite on my Macbook Pro 2013.
I have checked all the settings, and all seems to be correct, apart from it won't download any e-malis anymore.
(My outgoing emails from smtp.online.no seems to work fine though).
What can I do to get this fixed? Everything seems to be correct in all fields. But my Mail won´t establish any contact with my incoming pop.online.no account.

Hey there SirOlsen,
It sounds like you are unable to receive mail, but you seem to be able to send it without issue. I would use the Connection Doctor to help you troubleshoot the issue here:
OS X Mail: Troubleshooting sending and receiving email messages
You may even need to remove, and readd the account from your Internet Accounts pane of System Preferences:
Add your Twitter, Facebook, and other Internet Accounts - Mac Help
Thank you for using Apple Support Communities.
Cheers,
Sterling

Wifi doesn't work after Yosemite upgrade

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