[anyfoo]

iOS barely uses that. Processes commonly run as “mobile” or “root”, but it does not matter very much. POSIX users and access permissions are archaic, and, in my opinion, don’t match with how almost any device is being used nowadays. iOS implements its own concepts through entitlements, containers, vaults, sandboxes etc. (Look up the “Apple Platform Security Guide” for details.)

[nullindividual]

> Shared iPad security in iPadOS

> [...] User data is partitioned into separate directories, each in their own data protection domains and protected by both UNIX permissions and sandboxing.

POSIX users are quite important.

[saagarjha]

Yeah, it basically doesn't use UNIX permissions at all.