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The M1 chip in the new range of Macs includes the crypto extension that permits AES, SHA-1 and SHA-256 acceleration. But you can't find that out by querying the ELF aux vector, because macOS isn't even ELF-based at all, so there isn't an ELF aux vector, and no web search I've tried has turned up any MachO thing obviously analogous to it. Running 'sysctl -a' does show some flags indicating CPU architecture extensions, but they're more advanced ones than this. So I think we have to assume that if we're on the new M1 macOS at all, then we have the basic crypto extension available. Accordingly, I've added a special case to all the query functions that simply returns true if defined __APPLE__.