Apple Support Articles on Mitigations for Vulnerabilities in Intel CPUs

- How to enable full mitigation for Microarchitectural Data Sampling (MDS) vulnerabilities. This option is available for macOS Mojave, High Sierra, and Sierra after installing security updates. (Also see notes on significant performance impact of disabling hyper-threading and a list of unsupported mac models from 2009-2010 that despite getting security updates, are unable to support the fixes and mitigations due to a lack of microcode updates from Intel.)
- Additional mitigations for speculative execution vulnerabilities in Intel CPUs. (Also comments on recent Security Updates.)