I’ve been waiting a long time to see this out in the open.

Memory Integrity Enforcement delivers the strongest memory safety mitigations in the industry—by far. It sets a new standard for device security.

@shac posted a nice story a while ago, about the first 64-bit ARM architecture: over 12 years ago, Apple launched the iPhone 5s and introduced the ARM64 CPU. It was the first public disclosure of a 64-bit ARM architecture. No one else was even close to having a chip ready to tape out, let alone ship in a product—and the performance was a Frankenstein.

But what is often overlooked is the execution. When iOS shipped, it was a full 64-bit native release. There was no 32-bit code in the OS image (beyond the components required to support 32-bit third-party apps). Everything was aligned to the new architecture, including complex subsystems like the Safari JavaScript engine. Everything was ready on day one.

**This level of execution is something only Apple can deliver.**

And today, we see the same capabilities applied to security.

I’m deeply grateful to have been part of the exceptional team that worked tirelessly to make this happen.