
Following public disclosure of a security flaw with nearly every Intel processor produced for the last 15 years, concern grew that a fix may take up to 30 percent of the processing power away from a system. But Apple appears to have at least partially fixed the problem with December’s macOS High Sierra 10.13.2 with additional fixes seeming likely appear to be coming in macOS 10.13.3.
A number of anonymous sources within Apple have confirmed that routines exist within macOS High Sierra 10.13.2 that could grant applications access to protected kernel memory data. These measures, alongside existing programming requirements regarding kernel memory that Apple has implemented over the past decade, seem to have mitigated much of the issue.
The fix was further confirmed by developer Alex Ionescu, who called the code regarding the issue the “Double Map.”


