Skip to content
Thoughtful, detailed coverage of everything Apple for 30 years
and the TidBITS Content Network for Apple professionals
1 comment

Mac EFI Security Update 2015-001

Apple has released Mac EFI Security Update 2015-001 for OS X 10.8.5 Mountain Lion and 10.9.5 Mavericks in order to prevent a malicious application with root privileges from modifying a Mac’s EFI flash memory. Additionally, the EFI (Extensible Firmware Interface) update shuts down a memory corruption bug (also known as “Rowhammer”) in some DDR3 RAM that could enable full read-write access. These EFI updates are also included in the 10.10.4 Yosemite release (see “Apple Improves Networking in OS X 10.10.4,” 30 June 2015). Mac EFI Security Update 2015-001 is available as a direct download as well as via Software Update. (Free, 101 MB)

Subscribe today so you don’t miss any TidBITS articles!

Every week you’ll get tech tips, in-depth reviews, and insightful news analysis for discerning Apple users. For 29 years, we’ve published professional, member-supported tech journalism that makes you smarter.

Registration confirmation will be emailed to you.

Comments About Mac EFI Security Update 2015-001