The article
Meltdown and Spectre FAQ: Fix for Intel CPU flaws could slow down PCs and Macs and the Register articles (
1,
2) linked to in the NYT article Grelber listed, provide additional detail that may be helpful. It appears that Apple already rolled out some fix for Meltdown in Mac OS 10.13.2, and more is expected in 10.13.3. Not known is if or when Apple will address these flaws in older Mac OS versions.
