[BUG] `secureVmFeaturesEnabled = false` MDM policy not honored — Claude still holds `NoIdleSleepAssertion`

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Desktop holds a NoIdleSleepAssertion and prevents system sleep even when secureVmFeaturesEnabled is set to false via MDM managed preferences. The "Keep computer awake" toggle in the app remains interactive and functional despite the policy being enforced.

What Should Happen?

With secureVmFeaturesEnabled = false deployed via MDM, Claude Desktop should not assert sleep prevention. The "Keep computer awake" toggle should be inoperative (ideally greyed out or hidden), and no NoIdleSleepAssertion should be held by the process.

Error Messages/Logs

Managed preferences — policy is landing correctly:

$ defaults read /Library/Managed\ Preferences/com.anthropic.claudefordesktop.plist
{
    autoUpdaterEnforcementHours = 72;
    disableAutoUpdates = 1;
    isClaudeCodeForDesktopEnabled = 0;
    isDesktopExtensionDirectoryEnabled = 0;
    isDesktopExtensionEnabled = 0;
    isLocalDevMcpEnabled = 1;
    secureVmFeaturesEnabled = 0;
}


Power assertions — Claude is actively preventing sleep:

$ pmset -g assertions
pid 86717(Claude): [0x0002deae000194fa] 00:00:04 NoIdleSleepAssertion named: "Electron"

Steps to Reproduce

1. Deploy a computer-level MDM configuration profile targeting the com.anthropic.claudefordesktop preference domain with secureVmFeaturesEnabled set to false
2. Confirm the policy has landed: defaults read /Library/Managed\ Preferences/com.anthropic.claudefordesktop.plist — verify secureVmFeaturesEnabled = 0 is present
3. Launch Claude Desktop
4. Enable the "Keep computer awake" toggle in Claude Desktop settings
5. Run pmset -g assertions and observe that Claude holds a NoIdleSleepAssertion despite the policy

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.131 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_