Jan 20, 2016 Apple put out a security and stability update for OS X El Capitan on Tuesday. There are no new features, but quite a few stability and security tweaks. The update, 10.11.3, is recommended for all. Another Microsoft rep released a separate statement, “We know that some users of office 2016 for Mac are experiencing issues as a result of upgrading to Mac OS X 10.11 El Capitan.
Security updates 2017-001 and 2017-004 for Sierra and El Capitan respectively contain just fixes for the KRACK wi-fi exploit that still plagues Android and router manufacturers since its debut. Sep 02, 2016 Question: Q: Security Update 2016-001 El Capitan kills NVIDIA Driver Support I have just updated my machine to Security Update 2016-001 El Capitan and it killed NVIDIA Web Driver support. The latest version of NVIDIA Web Driver, that is 346.03.15f02 is incompatible.
On the same day that Apple patched it's front-line operating systems for the KRACK Wi-Fi attack vector, the company has also reached back a bit, and issued security updates for Sierra and El Capitan to fix the problem.
Security updates 2017-001 and 2017-004 for Sierra and El Capitan respectively contain just fixes for the KRACK wi-fi exploit that still plagues Android and router manufacturers since its debut earlier in October. Both updates are available through the Mac App Store.
Apple has issued no comment on patch status for the Airport family. The last firmware update for the Airport Extreme Base Station or Time Capsule was issued in December.
AppleInsider has reached out to Apple for more information regarding the AirPort family of devices, and has not as of yet received a response.
The exploit takes advantage of a four-way handshake between a router and a connecting device to establish the encryption key. Properly executed, the third step can be compromised, resulting in the re-use of an encryption key — or in some cases in Android and Linux, the establishment of a null key.
The researchers who discovered the attack claim that the exploit completely opens up an Android 6.0 and later devices. Other operating systems, including iOS and macOS are less impacted, but 'a large number of packets' can still be decrypted from all.
Both a router and a client device must be susceptible to the KRACK Attack vector for the assault to succeed. If either are patched, then no data can be gleaned from the man-in-the-middle method.
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Upgrading to Yosemite
To upgrade to Yosemite you must have Snow Leopard 10.6.8 or Lion installed. Download Yosemite from the App Store. Sign in using your Apple ID. Yosemite is free. The file is quite large, over 5 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
Macs that can be upgraded to OS X Yosemite
1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
7. Xserve (Early 2009) - Model Identifier 3,1 or later
El Capitan Update For Krack Security Issue Key
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right. Are my applications compatible? See App Compatibility Table - RoaringApps.
El Capitan Update For Krack Security Issue 1
Mar 12, 2018 7:28 PM