Because the x-apple-i-md-m header contains machine-specific information, it has been a subject of research regarding user tracking.
It was the ghost of a little girl’s last, failed attempt to say: Dad, I’m scared. x-apple-i-md-m
The used to calculate the hash on Windows vs. Mac. He simply sat in the humming dark, staring
Aris Thorne didn’t sleep for the rest of the night. He didn’t eat. He simply sat in the humming dark, staring at the impossible string, Kepler the fern casting a single, fragile shadow on the wall. The Stall wasn't a mystery anymore. It was a tombstone, and he had just learned to read the epitaph. staring at the impossible string
: Similar strings are sometimes used as hashed identifiers for hardware profiles in MobileMe or iCloud backend services. If You Are Troubleshooting
Because these headers deal with device identity, they are heavily protected. In standard iOS and macOS logs, the values for x-apple-i-md-m are often marked as to prevent third-party applications from scraping unique hardware identifiers.
