psnlk
Level 1 (0 points)

Q: Ethernet is Fast but WiFi is Slow on Mac

recently i updated the Macbook Pro with 10.10.3 then the WiFi speed went very slow, i used to get on the Ethernet 27-29Mbps and WiFi about 24-27Mbps, but after last week update to version 10.10.3 (previously had the OS X Yosemite) now WiFi speed is around 12Mbps, all other devices such as iPad and Iphone 6 plus wifi is fine and faster.

i reconfigured the Router still no luck

assigned manual IP's to the Router still same Problem.

MacBook Pro, OS X Yosemite (10.10.3)

Posted on May 5, 2015 1:26 PM

by Linc Davis,Apple recommended
Linc Davis Linc Davis
Level 10 (208,044 points)
Applications
A:

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 1

Take the applicable steps in this support article. The Wireless Diagnostics program generates a large file of information about your system, which would be used by Apple Engineering in case of a support incident. Don't post the contents here.

Be sure to test on more than one Wi-Fi network, if at all possible. A desktop computer can be tested with a mobile hotspot, such as the hotspot created by a cell phone. If the problem only exists on one network, then the access point of that network should be the focus of your attention, not the computer.

Step 2

Disconnect all USB 3 devices. If you don't know which are USB 3, disconnect all USB devices except keyboard and mouse.

Step 3

If you're not using a wireless keyboard or trackpad, disable Bluetooth by selecting Turn Bluetooth Off from the menu with the Bluetooth icon. If you don't have that menu, open the Bluetooth preference pane in System Preferences and check the box marked Show Bluetooth in menu bar. Test. If you find that Wi-Fi works better with Bluetooth disabled, you should use the 5 GHz Wi-Fi band. Your router may not support it; in that case, you need a new router.

Step 4

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 5

Open the Network pane in System Preferences and make a note of your settings in the Wi-Fi service. It may be helpful to take screenshots of the various tabs in the preference pane. If the preference pane is locked, unlock it by clicking the padlock icon and entering your administrator password. Delete Wi-Fi from the service list on the left by selecting it and clicking the minus-sign button at the bottom. Then recreate the service by clicking the plus-sign button and following the prompts.

Step 6

In the Wi-Fi settings, select

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

Click OK and then Apply.

Step 7

Reset the System Management Controller.

Step 8

Reset the PRAM.

Step 9

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. Turn Wi-Fi off and then back on. You'll be prompted for the password when you reconnect. Save it in the keychain.

Step 10

Make a "Genius" appointment at an Apple Store, or go to another authorized service center.

Posted on May 5, 2015 3:18 PM

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psnlk

Q: Ethernet is Fast but WiFi is Slow on Mac

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  • Helpful answers

  • by Baby Boomer (USofA),Helpful

    Baby Boomer (USofA) Baby Boomer (USofA) May 5, 2015 3:20 PM in response to psnlk
    Level 9 (57,660 points)
    May 5, 2015 3:20 PM in response to psnlk

    OSX Yosemite Wifi issues

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    Wave Siggy.gif

  • by Linc Davis,Apple recommended

    Linc Davis Linc Davis May 5, 2015 3:18 PM in response to psnlk
    Level 10 (208,044 points)
    Applications
    May 5, 2015 3:18 PM in response to psnlk

    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 1

    Take the applicable steps in this support article. The Wireless Diagnostics program generates a large file of information about your system, which would be used by Apple Engineering in case of a support incident. Don't post the contents here.

    Be sure to test on more than one Wi-Fi network, if at all possible. A desktop computer can be tested with a mobile hotspot, such as the hotspot created by a cell phone. If the problem only exists on one network, then the access point of that network should be the focus of your attention, not the computer.

    Step 2

    Disconnect all USB 3 devices. If you don't know which are USB 3, disconnect all USB devices except keyboard and mouse.

    Step 3

    If you're not using a wireless keyboard or trackpad, disable Bluetooth by selecting Turn Bluetooth Off from the menu with the Bluetooth icon. If you don't have that menu, open the Bluetooth preference pane in System Preferences and check the box marked Show Bluetooth in menu bar. Test. If you find that Wi-Fi works better with Bluetooth disabled, you should use the 5 GHz Wi-Fi band. Your router may not support it; in that case, you need a new router.

    Step 4

    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 5

    Open the Network pane in System Preferences and make a note of your settings in the Wi-Fi service. It may be helpful to take screenshots of the various tabs in the preference pane. If the preference pane is locked, unlock it by clicking the padlock icon and entering your administrator password. Delete Wi-Fi from the service list on the left by selecting it and clicking the minus-sign button at the bottom. Then recreate the service by clicking the plus-sign button and following the prompts.

    Step 6

    In the Wi-Fi settings, select

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

    Click OK and then Apply.

    Step 7

    Reset the System Management Controller.

    Step 8

    Reset the PRAM.

    Step 9

    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. Turn Wi-Fi off and then back on. You'll be prompted for the password when you reconnect. Save it in the keychain.

    Step 10

    Make a "Genius" appointment at an Apple Store, or go to another authorized service center.

  • by psnlk,

    psnlk psnlk May 5, 2015 2:37 PM in response to Linc Davis
    Level 1 (0 points)
    May 5, 2015 2:37 PM in response to Linc Davis

    thank you very much for the quick reply, so i have tried all the steps up to 6 and then each steps i have checked the speed with speedtest.net but no luck. then  i went to Reset the System Management Controller and followed the instructions , it's a good news, works perfect, back to the same speed i had. so i'm getting now 25 Mbps on the WiFi.

  • by sticky moments,

    sticky moments sticky moments Jul 7, 2015 12:25 PM in response to Linc Davis
    Level 1 (15 points)
    Jul 7, 2015 12:25 PM in response to Linc Davis

    Thanks, Linc, you deserve your Level 10 points AFAIC. I was getting superb Ethernet downloads on a new mid-2015 rMBP but dismal WiFi downloads (although, no outright loss of connectivity):  22.8Mbps down with Ethernet / 1.5Mbps down with WiFi. An older mid-2010 MBPro a few feet away was getting excellent WiFi downloads. All tested at www.speedtest.net. I got to step 7, Reset the System Management Controller and now have 21.4Mbps down, and 19.0Mbps down with-Bluetooth-re-enabled. I hope this lasts. Bravo, and many thanks.