Prevents unauthorized overwrite of system EFI on OS X 10.9.5.
The Apple EFI Security Update improves security of Mac OS X 10.9.5 systems by addressing an issue where EFI could potentially be overwritten without authorization. For more information on the security content of this update see https://support.apple.com/kb/HT205317.
Updated on Oct 22 2015
Note: Requires OS X 10.9.5.
Updater
86 MB
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