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Apple Reissues Security Update After Blocking Ethernet on Mac OS X
Apple over the weekend reissued a security update for OS X El Capitan systems after the initial update blocked Apple’s own Ethernet drivers.
The initial security update, which was installed on systems automatically in the background, was meant as a security measure designed to block kernel extensions that were harmful to the operating system. Apple issued the update to blacklist problematic kernel extensions, but mistakenly included the kernel extension information for its Ethernet drivers in it.
As soon as the update was installed on target OS X El Capitan machines, a process that did not require any user interaction, the Ethernet drivers were blocked and the affected Macs could no longer connect to the Internet via an Ethernet connection.