What changed in Apple macOS 26 (Tahoe) STIG V1R4V1R4 changes

Check text

Verify the macOS system is configured to display the Standard Mandatory DODDoW Notice and Consent Banner before granting remote access to the operating system with the following commands: bannerText="You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." test "$(cat /etc/banner)" = "$bannerText" && echo "1" || echo "0" If the test does not return a "1", this is a finding.

Fix text

Configure the macOS system to display the Standard Mandatory DODDoW Notice and Consent Banner before granting remote access to the operating system by creating a text file containing the required DODDoW text with the following commands: bannerText="You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." /bin/echo "${bannerText}" > /etc/banner

V-277037 in V1R4

Title

The macOS system must display the Standard Mandatory DODoW Notice and Consent Banner at the login window.

V-277039 in V1R4

Check text

Verify the macOS system is configured to use an authorized time server with the following command: /usr/bin/osascript -l JavaScript &lt&lt EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')1 .objectForKey('timeServer').js EOS If the result is not an authoritative time server that is synchronized with redundant USNO time servers as designated for the appropriate DODDoW network, this is a finding.

V-277057 in V1R4

Title

The macOS system must restrict maximum password lifetime to 6180 days.

Check text

Verify the macOS system is configured to restrict maximum password lifetime to 60180 days with the following command: /usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath '//dict/key[text()="policyAttributeExpiresEveryNDays"]/following-sibling::*[1]/text()' - | /usr/bin/awk '{ if ($1 &lt= 60180 ) {print "pass"} else {print "fail"}}' | /usr/bin/uniq If the result is not "pass" or fewer, this is a finding.

Fix text

Configure the macOS system to restrict maximum password lifetime to 6180 days by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.

Discussion

The macOS must be configured to enforce a maximum password lifetime limit of at least 60180 days. This rule ensures that users are forced to change their passwords frequently enough to prevent malicious users from gaining and maintaining access to the system. Note: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B states that complexity rules must be organizationally defined. The values defined are based on common complexity values, but each organization may define its own password complexity rules.

V-277145 in V1R4