Q: OSX Yosemite Wifi issues
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Sep 13, 2015 2:46 PMby steve626,Read your other post with details about your setup. You provided a lot of good information, some of which may have clues as to the issue.
"I've moved from an older Macbook (late 2011, OSX 10.10.5, continues to work well with the home network) to Early 2015 Macbook Pro 13" (256GB, Yosemite 10.10.4. The problem shows up after a) using Migration Assistant to install only Applications, and b) OS is updated to 10.10.5. Migration Assistant transferred only Applications from an older time machine backup of the older 2011 Macbook"
This indicates the issue might not be with 10.10.5 per se but rather with the setup (or hardware) in the newer computer. Use of Migration Assistant means you may have migrated over something older you had installed that is not compatible with the combination of hardware/firmware you are now using. This is one of the conundrums with the "brand new laptop" WiFi failures some are reporting, as the process of migrating old stuff over brings in the possibility that some of that old stuff doesn't work smoothly with the new hardware/firmware combination.
"Immediately after using Migration Assistant to transfer applications, updating to 10.10.5 I was able to observe the problem again ... Connectivity at work is 100% stable, even after Migration and Update with the third and the original Macbook."
That makes me suspicious of your router combination at home since the new laptop works well with routers at work.
"My home network:
* Belkin Router N600DB v3 (firmware up to date).
* Its setup with DHCP "off" to allow my Macbook to setup IP address from another router which connects to my ISP.
* pre-configured DNS entries.
* Wifi is 5GHz, WPA2 (AES).
* All channel selection is Auto."
Your combination of routers sounds interesting. Can you try a temporary more simple direct router => computer arrangement? The fact that your laptop is fine at work sounds like it works when some router combinations but not with others. I'd scrutinize the home setup. Also, just an anecdote, my home wireless connection is not stable when channel selection is on "auto" -- so I checked other signal strengths and picked the channel that looked best and told my router to use that one. Might not work for you but I'm offering that as something to try. Also check if there is a channel bandwidth setting you can adjust.
"So far I've learned, its not Wifi interference: signal strength is 80%+. None of my neighbours are using 5GHz band and there aren't any walls in the way."
Signal strength reflects both the wanted and unwanted signals on your channel frequency, so that's not a good indicator here. 5 GHz is much more fickle than 2 GHz and interference can come from other RF sources than WiFi signals, appliances etc.
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Sep 13, 2015 4:03 PMby nikstratos,I have try all suggested "fixes", problems remains. I am sure it only happens when the is a GOOD 5GHz connection with high transfer rates. It has nothing to do with the access point. I have the same problem with a Time Capsule (4th Gen) and a LinkSys router. Only my retina Macbook Pro 15" (April 2015) running Yosemite has the problem. It seems either the hardware or the software cannot keep up with high transfer rates. Apple should stop pretending there is no issue when is 3000 euro machine is partialy useless.
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Sep 13, 2015 7:15 PMby steve626,jndupuis1 wrote:
Wi-Fi is a non issue in the Microsoft Forums.
I don't know about the Microsoft forums, but it's a major issue in other Windows and PC forums, e.g.
Similar Windows stories as with "WiFI issues" reported here in Apple discussions -- reverting back to an earlier version of Windows fixed it, complaints that manufacturer doesn't know or care, people thinking maybe software, maybe hardware, maybe firmware, some fixed with simple remedies that didn't work for others, etc.
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Sep 14, 2015 2:34 AMby benjaminlo,ok, wrote a little workaround script. What this does: it restarts the network interface once it detects that it can't reach the gateway anymore (prevents you from manually having to disabel and re-enable the wifi networking). Just paste this is a terminal and it will create a launchdaemon ...
#-------start copy here-------
sudo bash
cd /Library/LaunchDaemons
echo '<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.bj.check_wifi</string>
<key>OnDemand</key>
<false/>
<key>ProgramArguments</key>
<array>
<string>/usr/local/bin/check_wifi</string>
</array>
</dict>
</plist>' > com.bj.check_wifi.plist
echo '#!/bin/bash' > /usr/local/bin/check_wifi
echo "gw=\`netstat -rn |grep en0|grep default |awk '{print \$2}'\`" >> /usr/local/bin/check_wifi
echo 'if [ $gw ]; then
if ping -c 2 -W 2 $gw &>/dev/null; then
sleep 0
else
networksetup -setairportpower en0 off
sleep 2
networksetup -setairportpower en0 on
fi
fi
sleep 5' >> /usr/local/bin/check_wifi
chmod a+x /usr/local/bin/check_wifi
launchctl load -w com.bj.check_wifi.plist
#-------stop copy here--------
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Sep 14, 2015 6:22 AMby benjaminlo,update: I noticed the delays are a bit too short, depending on how fast the network is reconnected, so I updated some of the delays:
#-------start copy here-------
sudo bash
cd /Library/LaunchDaemons
echo '<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.bj.check_wifi</string>
<key>OnDemand</key>
<false/>
<key>ProgramArguments</key>
<array>
<string>/usr/local/bin/check_wifi</string>
</array>
</dict>
</plist>' > com.bj.check_wifi.plist
echo '#!/bin/bash' > /usr/local/bin/check_wifi
echo "gw=\`netstat -rn |grep en0|grep default |awk '{print \$2}'\`" >> /usr/local/bin/check_wifi
echo 'if [ $gw ]; then
if ping -c 2 -W 2 $gw &>/dev/null; then
sleep 0
else
networksetup -setairportpower en0 off
sleep 3
networksetup -setairportpower en0 on
sleep 30
fi
fi
sleep 5' >> /usr/local/bin/check_wifi
chmod a+x /usr/local/bin/check_wifi
launchctl load -w com.bj.check_wifi.plist
#-------stop copy here--------
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Sep 25, 2015 8:23 AMby fusionmaster,This is good to hear ktsina and you are lucky, I tested the GM today booting from USB and had no such luck. My problems persist as before. In a nutshell:
1) 5 GHz channel below 48 initially connects, but then drops again, connects during Option click on Wifi symbol to display details.
2) 2.4 GHz all channels fine (all I have tested).
3) 5 GHz above channeal 48 seems fine (can not test seriously since mostly low channels are picked up).
4) Problem seems connected to specific AirPort Extreme hardware version since it does not occur on some other systems running newer or older hardware. The AirporExtreme card was changed to rule out a hardware fault here.
Reported the the bug repeatedly via the feedback system.
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Sep 25, 2015 8:29 AMby ktsmia,Now I'm confused! I actually never had wifi issues with Airport Extreme routers. The problem was always with other random brands. Since the upgrade, non-Extreme routers are working with no issues. However, I have not tested an Airport Extreme with El Capitan yet. I'll have access to one next week. I'll post if I find issues.
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Sep 28, 2015 11:39 AMby chexicano,Hi all, I had this problem for the longest time and got it fixed recently.
I have a MacBook Pro (13-inch, Mid 2012). Downloaded Yosemite in late July - worked great for the first couple weeks, then the wifi started dropping. Especially as a university student starting my semester, this problem really happened at the worst time. (Also I am on campus-wide wifi, so I couldn't reset router or anything; wasn't the problem anyways).
The wifi would sometimes drop as quickly as 30 seconds to as late as 1 hour after restarting the computer. Many times the wifi would not exist and state "Hardware Not Installed." I literally tried everything:
(1) Created a new location for wifi, deleted the wifi, created new wifi, renewed DHCP, etc.
(2) Re-installed Yosemite several times
(3) Deleted the files wthin Library/Preferences/SystemConfiguration
(4) Turned off Bluetooth and deleted com.apple.Bluetooth.plist
(5) Replaced IO80211Family.kext to version 7 (Mavericks)
(6) Attempted to download Mavericks over Yosemite (didn't end up working because my back-up was in Yosemite)
(7) Reset PRAM ... and basically every way to reshoot your Wifi (I called Apple Support - nothing worked)
I followed these boards for several weeks, went all around the internet to find solutions and none worked. So, I finally gave in and went to the Genius Bar. Although the employees kept saying the wifi dropping with Yosemite isn't a problem they've seen too much (...) they eventually said the problem was either my Airport Card or the Bluetooth Flex Cable.
They ended up replacing the Flex Cable (was $50 with labor), took 2 days because Apple was testing it to make sure it works. And now I've been with 2.5 days of normally working wifi. Hasn't dropped since I've gotten it back!
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Sep 30, 2015 5:09 PMby PJaswal,WORKS !!!!!!!!
Guys do the above steps and If you FAILED on everything just follow the steps below
1) Click on your Wifi icon (on the top).
2) Click on Create Network & select Channel 2
3) Once its connected wait for 5 seconds at least to establish the connection
4) Now click on your preferred Wifi network.
This should work.
Post reply if it helps to let others know about it. Good luck!
PJ~
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Sep 30, 2015 7:08 PMby wombat2k,Hate to be the bearer of bad news, but I just upgraded to El Capitan and still got the same issue.
I have found that enabling the setting "Prevent computer from sleeping automatically when the display is off" in the Energy Saver control panel in order to prevent my MBA from going to sleep when plugged in helps a lot.
