WiFi not reconnecting after sleep.

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Level 1

70 points

WiFi not reconnecting after sleep.

Following the most recent Mac OS X I now have to reset my router every time my Mac Book is closed and reopened. More details: Once the Mac Book Pro is reopened the WiFi icon in the top right is greyed out. When I click on it I see a list of local routers (including the one I should be connecting to by default) when I attempt to select any of them nothing happens. Once I reboot the router I am able to reconnect by turning Wi-Fi off and back on again. Turning Wi-Fi off and back on again does not work unless the router is reset. This is occurring the a Comcast/Xfinity issued router as well as at the local Starbucks which is on Google WiFi

Some additional info: This problem was not occurring prior the most resent Yosemite update, this I am 100% certain of. No firmware update has been issued to my router (confirmed with Comcast) also Google WiFi is not using Comcast at all so the problem has been validated with two different routers and currieries providing this is an Apple problem.

My Mac Book Pro is a 2012 model purchased in mid 2013. I am very unhappy with Apple about this.

NA

Posted on Jan 18, 2015 6:25 PM

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Answer 1

Best reply

Linc Davis

Level 10

209,541 points

Jan 18, 2015 6:53 PM in response to Ramzy76

Test after taking each of the following steps that you haven't already tried. Back up all data before making any changes.

1. Make sure the network is on the preferred list by following these instructions. It's important to read the article carefully, as it's the starting point for any further efforts to solve the problem. If you skip any of the steps, the problem may not be solved. Make sure the box marked

Remember networks this computer has joined

is checked.

2. Follow the instructions in this support article under the heading

Symptom: After restarting or waking from sleep, my computer might not connect to the Internet

3. Reset the PRAM.

4. Make a note of all your settings for Wi-Fi in the Network preference pane, then delete the connection from the connection list and recreate it with the same settings. You do this by clicking the plus-sign icon below the connection list, and selecting Wi-Fi as the interface in the sheet that opens. Select Join other network from the Network Name menu, then select your network. Enter the password when prompted and save it in the keychain.

5. From the Location menu at the top of the Network preference pane, select Edit Locations. A sheet will drop down. Click the plus-sign button to create a new location. Give it any name you want. In the new location, set up the Wi-Fi service with the same settings you used before. Click Apply and test.

6. Launch the Keychain Access application. Search for and delete all AirPort network password items that refer to the network. Make a note of the password first.

7. Repair permissions on the startup volume.

8. Turn off Bluetoothand test.

9. Reset the System Management Controller.

10. This step shouldn't be necessary, but has been advised by Apple Support in some cases, apparently as a workaround for a bug. Open the Energy Saver pane in System Preferences. If applicable, click the padlock icon in the lower left corner to unlock the settings. Enter your administrator login password when prompted.

Select the Power Adapter tab and uncheck the boxes marked

Wake for Wi-Fi network access

and

Enable Power Nap...

if present. Then, if the computer is a MacBook, select the Battery tab and uncheck

Enable Power Nap...

11. Reinstall OS X.

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Answer 2

Ramzy76 Author

Level 1

70 points

Jan 18, 2015 7:41 PM in response to Linc Davis

Thanks Linc,

Very useful info. It's unfortunate Apple put something in the most recent OS X patch that's led my computer (apparently only impacts select models) to be in this state and I hope their software engineers are monitoring these forums. Hopefully I can get this resolved before step 11. If I have to reinstall the OS post an Apple patch just to get my WiFi connectivity stable then that will be the final nail in the coffin for Apple's decline in quality for me. I don't know what's been going on with the company's QA lately but it's been very disappointing to watch the decline. It's unacceptable, one star behavior from a company that was once consistently five star.

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