This article originally appeared in TidBITS on 2017-01-17 at 11:11 p.m.
The permanent URL for this article is: http://tidbits.com/article/16999
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Security Update 2016-007 (Yosemite) and 2016-003 Supplemental (El Capitan)

by Agen G. N. Schmitz

On 13 December 2016, Apple released Security Update 2016-007 [1] for OS X 10.10 Yosemite and Security Update 2016-003 for 10.11 El Capitan with patches for a number of vulnerabilities, including one that could allow an application to execute arbitrary code with kernel privileges and another that could enable a local user to cause a system denial of service.

On 17 January 2017, Apple pushed out a new version of Security Update 2016-003 [2] to address a kernel issue that could cause a Mac running El Capitan to freeze and become unresponsive. If you applied Security Update 2016-003 before 17 January 2017, Security Update 2016-003 Supplemental [3] will appear in Software Update. Be sure to make a backup before installing any of these updates in case of problems! (Free. For 10.10.5 Yosemite, 498.1 MB; for 10.11.6 El Capitan, 717 MB (623.9 MB for Supplemental); release notes [4])

[1]: https://support.apple.com/kb/DL1902
[2]: https://support.apple.com/kb/DL1907
[3]: https://support.apple.com/kb/DL1908
[4]: https://support.apple.com/en-us/HT207423