about speculative execution vulnerabilities in arm-based and intel cpus apple released a support docume nt to answer any queries about the meltdown and spectre vulnerabilities that were recently discovered to affect most modern cpus. security researchers have recently uncovered security issues known by two names, meltdown and spectre. these issues apply to all modern processors and affect nearly all computing devices and operating systems. all mac systems and ios devices are affected, but there are no known exploits impacting customers at this time. since