The macOS system must disable iCloud Keychain synchronization.

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
mediumV-259501SRG-OS-000095-GPOS-00049APPL-14-002040SV-259501r958478_rule2024-12-042
Description
The macOS system's ability to automatically synchronize a user's passwords to their iCloud account must be disabled. Apple's iCloud service does not provide an organization with enough control over the storage and access of data and, therefore, password management and synchronization must be controlled by an organization approved service.
ℹ️ Check
Verify the macOS system is configured to disable iCloud Keychain synchronization with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudKeychainSync').js EOS If the result is not "false", this is a finding.
✔️ Fix
Configure the macOS system to disable iCloud Keychain synchronization by installing the "com.apple.applicationaccess" configuration profile.