macOS Gatekeeper Blocks Corporate App After Update

- Corporate app launch is blocked by Gatekeeper after update. - App worked before latest release. - Users request local bypass commands.

- Updated package signature/notarization mismatch. - Allowlist/profile rules no longer match app build. - MDM policy and package metadata are out of sync.

Document whether the issue affects one user, multiple users, or multiple devices. Confirm exact error messages, recent changes (password reset, update, network change), and whether the same issue reproduces in web vs desktop workflows where applicable.

Confirm the user is signed in with the correct corporate account, system time is accurate, network/VPN connectivity is stable, and the application is not running in offline or limited mode.

Use the command snippets below to collect non-destructive diagnostics. Capture output in the ticket when escalation may be required. Avoid deleting profiles, cached credentials, or managed app data unless the runbook or admin approval explicitly allows it.

- Capture exact Gatekeeper warning and app version. - Validate signature/notarization status with approved tooling. - Confirm deployment package came from approved source. - Use managed redistribution/update path for fixes.