Ensure Apple Mobile File Integrity (AMFI) Is Enabled

HighLevel 1Automatedmacos

Description

Apple Mobile File Integrity (AMFI) was first released in macOS 10.12. The daemon and service block attempts to run unsigned code. AMFI uses launchd, code signatures, certificates, entitlements, and provisioning profiles to create a filtered entitlement dictionary for an app. AMFI is the macOS kernel module that enforces code-signing and library validation. Apple Mobile File Integrity validates that application code is validated.

How it is checked

Audit method: Shell command

shell

out=$(/usr/sbin/nvram -p 2>/dev/null) || exit 1
printf '%s\n' "$out" | /usr/bin/grep -c "amfi_get_out_of_my_way=1" || true

Expected output: 0

How it is fixed

Fix method: Guidance or infrastructure patch

Terminal Method: Run the following command to enable the Apple Mobile File Integrity service: % /usr/bin/sudo /usr/sbin/nvram boot-args=""

Properties

Operating systems: macos-14
Tags: macossonoma
Reference: CIS Apple macOS 14.0 Sonoma Benchmark v3.1.0 - 5.1.3 Ensure Apple Mobile File Integrity (AMFI) Is Enabled

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target macos