Filesystem:/usr/libexec/countryd

countryd determines the user's physical country based on multiple characteristics. It is used by the eligibility system to ensure it is difficult to spoof the user's true physical location. It was introduced in iOS 16.2 and macOS 13.0.

Quoting from the man page:

Receives country code updates from user location, mobile country code (when available) and nearby 802.11d wifi access points. This information is then stored in a cache and used to compute a country code estimate which combines both the on-device code computed from local sensors, and answers about which country nearby devices believe they are in.

Man page contents

COUNTRYD(8)                 System Manager's Manual                COUNTRYD(8)

NAME
     countryd – Listens for country-level information and makes that available
     to users of RegulatoryDomain.framework

SYNOPSIS
     Takes no arguments, and should not be launched manually.

DESCRIPTION
     Receives country code updates from user location, mobile country code
     (when available) and nearby 802.11d wifi access points. This information
     is then stored in a cache and used to compute a country code estimate
     which combines both the on-device code computed from local sensors, and
     answers about which country nearby devices believe they are in.

HISTORY
     countryd first appeared in macOS 13

Darwin                          October 5, 2021                         Darwin