Fix WiFi connectivity on MAC

First of all, you need to figure out the exact issue with your MAC device. You need to follow following steps to fix the MAC Wi-Fi connectivity issue:

  • Check your MAC for updates:
    • Your device should be up to date with all the firmware updates.
    • You need to check for all the available software updates and install them.
    • In case of third-party Wi-Fi router, you need to check all the available firmware updates for the device and install all of them.
    • Update your Apple Wi-Fi base station for all the firmware updates.
  • Check all the cable connections: Check your router cables, if they are plugged in properly. You need to verify the power and Ethernet cables for connections to the device. If any of these wires seems damaged, then you can get them replaced, and this step should fix the issue.
  • Your MAC device should be checked for all the recommended settings. Any alterations to the settings may result in Wi-Fi connectivity loss.
  • Restart your router: Switch off the router, wait for 30 seconds and turn it back on. Then try to reconnect your MAC to check the internet connectivity.
  • Wireless diagnostic: Along with other new features of MAC OS X 10.8.4, Apple has introduced wireless diagnostic tool. This tool diagnoses the issue and fixes it.Steps to run the diagnostic tool:
    • Press Alt Key and simultaneously click on airport icon which is located on right-hand side of top menu bar.
    • Open wireless diagnostic.
    • Press continue.

PFB the images for demonstration:

unable to connect mac to wifi

Wireless diagnostics will check the issue with your MAC device and will send the diagnostic report to Apple.

mac connectivity issues

Click on Continue at the bottom of the dialog box to permit sending the report to Apple.

If the issue persists after following the resolutions mentioned above, then you can check if the router is in the proper range of the device.

Tips for router positioning:

  • Try to shift your router near the MAC device, as the distance may affect the signal strength.
  • Check if your router signals are obstructed by any furniture or household items in between. You can try placing the router a bit higher than the current position.
  • Avoid placing any electronic device like an electric fan, microwave, refrigerator, etc. between router and MAC device as they may obstruct the signals.
  • If your router has expandable antennae, try placing both antennae at 90 degrees to each other. Putting one antenna horizontally and another vertically may increase the signal strength to your device.

Troubleshooting:

Issue: Not able to connect MAC to internet

Resolution: Follow below-mentioned steps to fix the issue:

  • Check if your Wi-Fi is turned on if it is turned off then select turn Wi-Fi on from the menu.
  • Verify if the Wi-Fi you have connected to is the right one.
  • Check TCP/IP settings under system preferences by following these steps:
  • Go to Apple menu and select system preference.
  • Under view menu select Network.
  • Choose Wi-Fi, then press the advanced button in the lower left-hand corner on the screen.
  • Click TCP/IP option from the menu. If IPv4 address doesn’t appear or if the IP address is in the format 169.254.xxx.xxx, then you need to renew DHCP lease.
  • You can approach your network administrator to find correct TCP/IP setting for your Wi-Fi network, following which your MAC should be able to connect to the internet.
  • If the TCP/IP settings are as required but you are still not able to connect to internet then check DNS tab for settings. Since DNS converts IP address to URL and URL to IP address, so it should be correct for the internet to work correctly.

Issue: Wi-Fi is working slow and is showing following indications:

  • Not able to download or stream movies.
  • Apps such as iTunes take a long time to load or function.
  • Web pages take too long to respond.

Resolution:

If your internet is working too slow, then you can check your network protocol. The standard Wi-Fi protocol 802.11n provides the best internet speed. Following steps will guide you on how to check your protocol:

  1. Press the Option key, then go to MAC menu bar and click on Wi-Fi icon. You can check the protocol next to PHY mode. If it is not as desired, then check Wi-Fi router settings and contact your router manufacturer.
  2. Turn off other devices connected to the internet as well as other running applications. Running applications like a file server, online games, live video steaming consume considerable network bandwidth. Turning off these applications might save some network space for your other essential tasks over the internet and can eventually increase the internet speed. There might be multiple devices connected to the internet through the same router, and they might as well slow down the speed. So you can try disconnecting the devices you are not using currently.
  3. You can check the authentication mode on your router under router settings. If WPA 2 mode is available, then you can use it as it increases the Wi-Fi security. There are other authentication modes available as well, but that may decrease the internet speed. If the issue persists even after changing authentication mode, then you can get in touch with your router manufacturer.
  4. Verify if your MAC device is in range of your router and if there is any interference with the signals.
  5. Try connecting your MAC device to some other network. If it connects to them correctly, then it may be the issue with your router or ISP. So you would need to get in touch with your router manufacturer or ISP.

Issue: Wi-Fi connection is dropping and is showing following indications:

  • Your MAC device is not able to connect to your Wi-Fi device.
  • While working on the internet, the MAC device is getting intermittently disconnected from the internet.

Resolution:

To fix the issue of intermittent internet disconnection, you can follow these steps:

  1. Verify if your MAC device is within the range of the router and if there is no interference in the signals received by the device.
  2. You can try moving your MAC device near to your router and remove any signal interference by electronic devices between the MAC product and the router.
  3. You can try connecting your MAC device to some other network within range. If it can connect to other networks without any issue, then this may be the issue with your router or ISP. You need to get in touch with your router manufacturer or the ISP.