I haven’t seen reports confirm this (only for the A19 chip) so I just bought a new M5 MacBook Pro 14″ and did this:
$ sysctl -a | grep MTE4
hw.optional.arm.FEAT_MTE4: 1
MTE4 is the “enhanced memory tagging extension”[1] that underlies Apple’s broader Memory Integrity Enforcement system.
More on MIE and why it’s cool: https://security.apple.com/blog/memory-integrity-enforcement/
[1] https://developer.arm.com/documentation/109697/0100/Feature-descriptions/The-Armv8-9-architecture-extension?lang=en#md454-the-armv89-architecture-extension__FEAT_MTE4
Comments URL: https://news.ycombinator.com/item?id=45711079
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Source: news.ycombinator.com
