hdiutil is deprecated in macOS 27 Golden Gate

Apple deprecated the macOS 27 Golden Gate command-line tool hdiutil and recommends using diskutil’s image subcommands for all disk-image tasks, including ASIF support. In tests, diskutil built an encrypted UDZO image in 40–45 seconds—about half the time of hdiutil—and produced a 2.8 GB file. Diskutil failed on root-owned files without prompting for authentication, whereas hdiutil did prompt. The only difference between the images was a ~/.Trash folder, reflecting diskutil’s default-scrub behavior.