OSX Yosemite Wifi issues

Hey guys I think I have finally cured my wifi woes.

I followed steps 5 and 7 from the following post on this thread WiFi keeps dropping after Yosemite 10.10.3 update

My connection isn't dropping at all now. Give it a try if you were having issues similar to my previous post above.

Linc Davis wrote:

Please test after taking each of the following steps that you haven't already tried. Stop when the problem is resolved. Back up all data before making any changes.

Step 5

Open the Energy Saver pane in System Preferences and unlock the settings, if necessary. Select the Power Adapter tab, if there is one. Uncheck the box marked

Wake for Wi-Fi network access

if it's checked.

Step 7

In the Wi-Fi settings, select

Advanced... ▹ TCP/IP ▹ Configure IPv6: Link-local only

Click OK and then Apply.

<vent> I am still hoping that 10.10.4 will finally fix the wifi issues on my mid-2012 MBP for good; I haven't dared to update since 10.10.1 since there always seemed to be quite a few people for whom each new release screwed up their wifi connection (for the first time since Yosemite came out, or even more than before.) And now comes OSX El Capitan...

Never again will I be an early adapter - Apple lost a fangirl with Yosemite, - so if 10.10.4 does work out, wifi-wise, I guess I will have to stick with it until, I don't know, forever. I'd much rather have the same OSX for a few years, with minor tweaks, as long as it doesn't make my MBP completely useless, than having to keep experimenting with a new one each year - or, like with El Capitan, after ten months?! Ugh. </vent>

https://www.apple.com/pr/library/2015/06/08Apple-Announces-OS-X-El-Capitan-with- Refined-Experience-Improved-Performance.…

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Dear cairoli91

You could go back to Mavericks. If you have regular backups you could restore from a pre Yosemite backup and then restore all your documents from a backup you made just before the restore from the old backup. Since I have not tried this myself to be on the safe side I probably would also copy my important files onto an external hard disk for safety. App store purchases can be reinstalled from the store if need be, but you could also copy the Apps to the disc.

If you want to do a clean install you can also re-download the Mavericks installer from the Purchases tab the App store (http://osxdaily.com/2013/11/01/re-download-os-x-mavericks-installer-mac-app-stor e/). Of course rolling back to an older operating system is not really recommended. I used this method to create a clean USB installer for Mavericks to test if my hardware had a problem.

Before the roll back I would probably test a clean install of Yosemite on a USB stick or starting the Mac in Safe Mode (Try safe mode if your Mac doesn't finish starting up - Apple Support) to check if there is not something else broken.

The danger with the roll back of course is that some of the updated App's won't work for Mavericks and that of course you have all the security holes that the consecutive Upgrades have closed. The procedure with the clean install from the Mavericks installer is not as straight forward as the roll-back from the Time Machine Backup

I have an early 2015 Macbook Pro and am baffled that with just the laptop on the network, it causes the router to reboot.

I've recorded details in a thread I'd started before I arrived here to find latest comments.

Wifi Signal Strong But Can't Connect (Macbook pro 13" Early 2015)

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--------

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--------

After performing a clean install of El Capitan on both (early 2015, late 2011) my Macbook wifi connections are stable. I've observed them for over a week and the earlier symptoms are no longer present (wifi connection stays strong but no connectivity). On completing the clean install, I took a comprehensive time machine snapshot. Now I'm only restoring data back to the new machines.

There's no way to be sure if this will work for others and is obviously a lossy step. Makes me think that an application install may have upset TCP parameters. Can't be sure.

thinkSantosh wrote:

After performing a clean install of El Capitan on both (early 2015, late 2011) my Macbook wifi connections are stable. I've observed them for over a week and the earlier symptoms are no longer present (wifi connection stays strong but no connectivity). On completing the clean install, I took a comprehensive time machine snapshot. Now I'm only restoring data back to the new machines.

There's no way to be sure if this will work for others and is obviously a lossy step. Makes me think that an application install may have upset TCP parameters. Can't be sure.

Glad to hear you figured it out! Sounds like some software that had been installed conflicted, or an inherited setting caused a conflict, since your clean install worked.

Another possibility is router settings (apparently not in your case, but others in this thread reported a "fix" having to do with their router).

If it's not software, or a setting, and not the router, then I would suspect a hardware defect.

The Apple computers are mass produced, and they are identical (although the production line can change over time, but any one configuration of hardware is produced in quantities of ~ millions). Hence the most likely user-unique source for problems would be user settings/software, or the router setup. And these things can work under 10.9 but fail under 10.10 or 10.11, since different protocols come into play with a new OS (sometimes).

Some may report a "brand new" laptop has the WiFi problem. But the first thing that is done when one turns on a new laptop is to migrate settings and software from the older computer. That can migrate over something that can conflict, as your clean install showed. If someone actually purchases a new Apple router + laptop and right out of the box WiFi does not work before anything is migrated or installed -- well that could point to defective hardware, router setting or WiFi interference. All have been reported in this lengthy thread.

My personal experience was a combination of two things (some years ago with an earlier OS): a congested RF environment (neighbors' access points) plus my router setting. The default router setting was to auto-select the WiFi channel and a wide channel bandwidth. I figured out that assigning a specific channel and narrowing the bandwidth (both settings on the router) eliminated all the frequent disconnects I had been seeing. This is not to say this can solve for the problems reported in this Discussions thread, but people need to look for their unique cause(s) as thinkSantosh did.

Here are the most prevalent solutions available:

1. Creating a New Wi-Fi Service (this solution worked for me!)
   • Copy and paste these instructions, because you'll be disconnected from the Internet and you'll need to reboot.
   • Go into your Network Preferences > Select Wi-Fi Service (in the list in the left column) > Click on the options (cog icon) > Select "Make Service Inactive" > Select Apply.
   • Select the same Wi-Fi Service > Delete It ( – ). Reboot.
   • Return to Network Preferences > Create a New Service ( + ).
   • Inside the prompt select Wi-Fi under Interface, name the Service Name something other than Wi-Fi. (I named mine Wi-Fi2. Apparently if you retain the previous Wi-Fi name the WiFi dropping will return on reboot.) > Click Create.
   • Click Apply.
2. Delete and Reconnect to your Preferred Network

   Go into your Network Preferences > Advanced > Select Your WiFi Network and Delete It ( – ). Reconnect to it.

3. Delete Bluetooth.plist

   Finder > Go (on your toolbar) > Computer > HD > Library > Preferences > Delete your Bluetooth.plist. Reboot.

4. Delete SystemConfiguration

   Finder > Go (on your toolbar) > Computer > HD > Library > Preferences > Delete your SystemConfiguration. Reboot.

5. Reset PRAM

   Reset your PRAM (Haven't tried it myself so I don't feel right instructing others how to do it, sorry!).

Sorry if this isn't as comprehensive or clear as you may need. If you need more clarification, I'll keep this thread open and check periodically.

Good luck!

I tried everything and this worked for me!

Thanks to whoever found this fix.

• Copy and paste these instructions, because you'll be disconnected from the Internet and you'll need to reboot.
• Go into your Network Preferences > Select Wi-Fi Service (in the list in the left column) > Click on the options (cog icon) > Select "Make Service Inactive" > Select Apply.
• Select the same Wi-Fi Service > Delete It ( – ). Reboot.
• Return to Network Preferences > Create a New Service ( + ).
• Inside the prompt select Wi-Fi under Interface, name the Service Name something other than Wi-Fi. (I named mine Wi-Fi2. Apparently if you retain the previous Wi-Fi name the WiFi dropping will return on reboot.) > Click Create.
• Click Apply.

I tried everything and this worked for me!

Thanks to whoever found this fix.

• Copy and paste these instructions, because you'll be disconnected from the Internet and you'll need to reboot.
• Go into your Network Preferences > Select Wi-Fi Service (in the list in the left column) > Click on the options (cog icon) > Select "Make Service Inactive" > Select Apply.
• Select the same Wi-Fi Service > Delete It ( – ). Reboot.
• Return to Network Preferences > Create a New Service ( + ).
• Inside the prompt select Wi-Fi under Interface, name the Service Name something other than Wi-Fi. (I named mine Wi-Fi2. Apparently if you retain the previous Wi-Fi name the WiFi dropping will return on reboot.) > Click Create.
• Click Apply.

nicknish wrote:

Here are the most prevalent solutions available:

1. Creating a New Wi-Fi Service (this solution worked for me!)
   • Copy and paste these instructions, because you'll be disconnected from the Internet and you'll need to reboot.
   • Go into your Network Preferences > Select Wi-Fi Service (in the list in the left column) > Click on the options (cog icon) > Select "Make Service Inactive" > Select Apply.
   • Select the same Wi-Fi Service > Delete It ( – ). Reboot.
   • Return to Network Preferences > Create a New Service ( + ).
   • Inside the prompt select Wi-Fi under Interface, name the Service Name something other than Wi-Fi. (I named mine Wi-Fi2. Apparently if you retain the previous Wi-Fi name the WiFi dropping will return on reboot.) > Click Create.
   • Click Apply.
2. Delete and Reconnect to your Preferred Network

   Go into your Network Preferences > Advanced > Select Your WiFi Network and Delete It ( – ). Reconnect to it.

3. Delete Bluetooth.plist

   Finder > Go (on your toolbar) > Computer > HD > Library > Preferences > Delete your Bluetooth.plist. Reboot.

4. Delete SystemConfiguration

   Finder > Go (on your toolbar) > Computer > HD > Library > Preferences > Delete your SystemConfiguration. Reboot.

5. Reset PRAM

   Reset your PRAM (Haven't tried it myself so I don't feel right instructing others how to do it, sorry!).

Sorry if this isn't as comprehensive or clear as you may need. If you need more clarification, I'll keep this thread open and check periodically.

Good luck!

None of these have worked. I lose wifi within 2-4 hours.

The only thing that has worked for me is moving to a 2.4Ghhz network but all that does is buy me more time as it eventually fails too.

1. I had this problem for 5 days. I normally log into a normal user account.
2. I tried every single tweak and change etc on this thread and others. Nothing worked.
3. I logged into an Administrator account, and it works, no changes needed!

So, bottom line: this seems to only be an issue with Wi-Fi not working for non-administrator users. At least in my case.

It works consistently for the Admin account, but I can't figure out any difference in the Network/Wi-Fi settings for users. Perhaps insufficient permissions to access the Wi-Fi interface?

(Macbook pro retina, late 2012)

I update from 10.9.5, failed because of WIFI drop and not able to initiate setup wizard, and reinstall 10.10 with merged back user data. After that I don't have major issue with WIFI at home and at school.

My case here is when I travel to a different county yesterday and being a guest with my host, the WIFI drop happen again. It is so annoying and I am so afraid that the nightmare of WIFI drop comes back again. Tried almost everything in the thread and nothing works. Today I bring my mac to a coffee shop with their free WIFI and it works without any issue. Here is my small input:

• This issue might related to different wireless router and configuration.
• Or, just related to the WIFI encryption.