What if Mac cable doesn't go online?

What if the Mac suddenly connects to the cable network and can't get online? Apple recently for the OS X pushed a security upgrade, however, there have been many user feedback, after the update can not wired internet, which PC6 small series using the imac also recruit, after the identification of the original NIC driver was added to the blacklist led to not start, It also gives a wake-up call to users who have not yet met the problem. This time, the security upgrade called "031-51913 incompatible Kernel Extension Configuration Data 3.28.1", which led to Mac's inability to wirelessly surf the internet, will be blacklisted for Broadcom BCM5701 network card drivers. The Ethernet interface associated with this drive is also invalidated.

First, Mac users who are unable to access the wired network can go to the "about this computer"-"System Report"-"Software"-"install" to see if there is a version of 3.28.1 security update, as shown in the figure:

If you are unlucky, do not worry, you can still access WiFi for wireless internet access, but also a user said that even the wireless network can not be used. In response, Apple has quickly removed "3.28.1" and pushed new "3.28.2" upgrades, while also providing solutions to different situations for users who are unable to access the Internet, mainly to find ways to upgrade to "3.28.2".

The following are solutions that allow you to use WiFi access:

-Open Terminal Command Window

-Enter "sudo softwareupdate--background" and enter, upgrade "incompatible Kernel Extension Configuration Data" to the latest version, review it Again, Confirm that you have upgraded to the 3.28.2 version of the security update.

-Exit Terminal Command window, reboot mac

If you can't access the network via WiFi, go to the Apple website to see another detailed solution.