STIG V-277095 | The macOS system must disable iCloud ...

macOS 26 - Tahoe

The macOS system must disable iCloud Reminders

STIG ID: APPL-26-002013 | SRG: SRG-OS-000095-GPOS-00049 | Severity: Medium | CCI: CCI-000381 | Vulnerability ID: V-277095

Description

The macOS built-in Reminders.app connection to Apple's iCloud service must be disabled.

Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, automated reminders synchronization must be controlled by an organization-approved service.

Check

C-81250r1148735_chk

Verify the macOS system is configured to disable iCloud Reminders with the following command:

/usr/bin/osascript -l JavaScript << EOS
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\
.objectForKey('allowCloudReminders').js
EOS

If the result is not "false", this is a finding.

Fix

F-81155r1148736_fix

Configure the macOS system to disable iCloud Reminders by installing the "com.apple.applicationaccess" configuration profile.