homebrew-cask/developer/bin/list_loaded_kext_ids

#!/bin/bash

readonly program="$(basename "${0}")"

function usage {
  echo "
    List Bundle IDs for currently loaded kernel extensions (kexts). Useful to identify kexts installed by packages. Kexts attributed to Apple are excluded from the output.

    Usage:
      ${program} [options]

    Options:
      -h, --help   Show this message.
  " | sed -E 's/ {4}//'
}

if [[ "${1}" =~ ^(-h|--help)$ ]]; then
  usage
  exit 0
fi

/usr/sbin/kextstat -no-kernel -list-only | \
  /usr/bin/awk '{print $6}' | \
  /usr/bin/grep --invert-match '^com\.apple\.'