---
id: os_account_modification_disable
title: Disable AppleID and Internet Account Modifications
discussion: |
  The system _MUST_ disable account modification.

  Account modification includes adding additional or modifying internet accounts in Apple Mail, Calendar, Contacts, in the Internet Account System Setting Pane, or the Apple Account System Setting Pane.

  This prevents the addition of unauthorized accounts.

  [IMPORTANT]
  ====
  Some organizations may allow the use and configuration of the built-in Mail.app, Calendar.app, and Contacts.app for organizational communication. Information System Security Officers (ISSOs) may make the risk-based decision not to disable the Internet Accounts System Preference pane to avoid losing this functionality, but they are advised to first fully weigh the potential risks posed to their organization.
  ====
references:
  nist:
    cce:
      macos_27:
        - CCE-XXXXX-X
      macos_26:
        - CCE-95155-8
      macos_15:
        - CCE-94155-9
      macos_14:
        - CCE-93012-3
      ios_27:
        - CCE-XXXXX-X
      ios_26:
        - CCE-95430-5
      ios_18:
        - CCE-94514-7
      ios_17:
        - CCE-93468-7
      visionos_27:
        - CCE-XXXXX-X
      visionos_26:
        - CCE-95560-9
    800-53r5:
      - AC-20
      - AC-20(1)
      - CM-7
      - CM-7(1)
    800-171r3:
      - 03.01.20
      - 03.04.06
  disa:
    cci:
      - CCI-000381
    srg:
      - SRG-OS-000095-GPOS-00049
    disa_stig:
      macos_26:
        - APPL-26-002120
      macos_15:
        - APPL-15-002120
      macos_14:
        - APPL-14-002120
    cmmc:
      - AC.L1-3.1.20
      - CM.L2-3.4.6
      - CM.L2-3.4.7
  hhs:
    hicp:
      - 2.L.A
      - 2.L.B
      - 3.L.B
      - 3.L.C
  cis:
    controls_v8:
      - 4.1
      - 4.8
  bsi:
    indigo:
      ios_26:
        - ANNEX K
      ios_18:
        - ANNEX K
      ios_17:
        - ANNEX K
platforms:
  macOS:
    '27.0': {}
    '26.0':
      benchmarks:
        - name: disa_stig
          severity: medium
    '15.0':
      benchmarks:
        - name: disa_stig
          severity: medium
    enforcement_info:
      check:
        shell: |-
          /usr/bin/osascript -l JavaScript << EOS
          $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\
          .objectForKey('allowAccountModification').js
          EOS
        result:
          string: 'false'
    introduced: '14.0'
  iOS:
    '27.0': {}
    '26.0':
      supervised: true
      benchmarks:
        - name: indigo_high
    '18.0':
      supervised: true
      benchmarks:
        - name: indigo_high
    '17.0':
      supervised: true
      benchmarks:
        - name: indigo_high
    introduced: '7.0'
  visionOS:
    '27.0': {}
    '26.0':
      supervised: true
    introduced: '2.0'
tags:
  - 800-53r5_low
  - 800-53r5_moderate
  - 800-53r5_high
  - 800-171
  - cisv8
  - cnssi-1253_low
  - cnssi-1253_high
  - cmmc_lvl2
  - cmmc_lvl1
  - cnssi-1253_moderate
  - hicp_lp
  - cmmc_lvl3
mobileconfig_info:
  - PayloadType: com.apple.applicationaccess
    PayloadContent:
      - allowAccountModification: false
