Apple issues Security Updates for OS X El Capitan and Yosemite

By , Sep 1, 2016

OS X El Capitan

Apple on Thursday issued Security Updates for OS X El Capitan and Yosemite. The releases patch multiple vulnerabilities that allow an application to disclose kernel memory, and executive arbitrary code with kennel privileges.

If this sounds familiar, it’s because these are the same exploits patched in the latest iOS 9.3.5 update. Apple again credits Citizen Lab and Lookout research firms with the find, and recommends that all users install the updates.

Here are your full release notes:


Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11.6

Impact: An application may be able to disclose kernel memory

Description: A validation issue was addressed through improved input sanitization.

CVE-2016-4655: Citizen Lab and Lookout


Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11.6

Impact: An application may be able to execute arbitrary code with kernel privileges

Description: A memory corruption issue was addressed through improved memory handling.

CVE-2016-4656: Citizen Lab and Lookout

For those that missed it, last week it was exposed that notorious digital arms dealer NSO Group has been selling software built using these exploits. The program can read texts and emails, track location, and record sounds and passwords.

Today’s Security Updates can be installed via the Updates tab in the Mac App Store.

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  • Agneev Mukherjee

    How can I get the updates?

    • Cazz

      mac app store

      • Agneev Mukherjee

        Ok, thanks!

  • Cin

    Now, I am afraid of updates…. Last time I updated, on reboot, I got the black screen of death….

    • techfreak23

      That’s why you should always have a backup of your data before you do any kind of update. Most of the time, those problems can be resolved with a restore unless you had a hardware issue. Obviously that’s more involved.

      • Cin

        I have a backup after everyday.. I didnt lose a single file.. It was the magic board.. so yes, hardware in my case but I blame the update to death lol. Apple even advised me to not do updates through the app store because I was on beta program.. Do manual fresh install.

      • Rolf Bause

        Back in the day, this literally NEVER happened… Granted, software got more and more complex over the years, but their quality control also really sucks these days…

      • techfreak23

        That’s very true. Software also used to years to develop where each lines of code was more scrutinized. I will agree that their quality control has gone down significantly in recent years because of this whole need to put out new hardware refreshes or software upgrades every year. Truly saddening. Same this with video games shipping out essentially unfinished and having first day patches or DLC.

  • Rick Hart

    Wonder if is patched in Sierra

  • Mr_Coldharbour

    Last sentence of 1st paragraph reads “kennel privileges” it should read “kernel privileges.”

  • Mr_Coldharbour

    You should also mention that for those who can’t see those updates (for whatever reason) on the Mac App Store, you can head over to Apple’s website and go to the “Downloads” section of the page and there you should see updates and the like.