OS X update leave your Mac's ethernet port broken? Here's the fix

Last week Apple released a minor patch for OS X in the form of a kernel extension update. Labeled "031-51913 Incompatible Kernel Extension Configuration Data 3.28.1," the update turned out to be bugged, leaving many Mac users without a working ethernet port. Well, at least those with Macs that still have ethernet ports. It took a little time, but Apple …