The macOS system must disable iCloud Mail.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259490	APPL-14-002015	SV-259490r941092_rule		Medium

Description
The macOS built-in Mail.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 mail synchronization must be controlled by an organization approved service.

STIG	Date
Apple macOS 14 (Sonoma) Security Technical Implementation Guide	2024-01-10

Details

Check Text ( C-63229r941090_chk )
Verify the macOS system is configured to disable iCloud Mail with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.applicationaccess')\ .objectForKey('allowCloudMail').js EOS If the result is not "false", this is a finding.

Fix Text (F-63137r941091_fix)
Configure the macOS system to disable iCloud Mail by installing the "com.apple.applicationaccess" configuration profile.