Apple's Statement on Meltdown and Spectre

So still no fix in sight for 10.12? My personal laptop refuses to upgrade to High Sierra and my work laptop is yet able to upgrade because we have do some work with our mac management before that time. I haven't seen anything from Apple on older OSes and their status

I've been extremely impressed with Apple's PR as of late. It's almost unbelievable how many systems these vulnerabilities affect.