Intel says issue impacts other chip vendors, not just Intel:
https://newsroom.intel.com/news/intel-responds-to-security-research-findings/
https://spectreattack.com/
says: At the moment, it is unclear whether ARM and AMD processors are also affected by Meltdown.
https://security.googleblog.com/2018/01/todays-cpu-vulnerability-what-you-need.html
https://googleprojectzero.blogspot.co.uk/2018/01/reading-privileged-memory-with-side.html
A few news sources are saying Apple has a fix in place:
http://appleinsider.com/articles/18/01/03/apple-has-already-partially-implemented-fix-in-macos-for-kpti-intel-cpu-security-flaw
Official T-Shirts: coming soon…
Firmware Security 