ChatGPT Mac App: Forced Update Due to Security Breach

If you use the ChatGPT desktop app on Mac, you will be forced to update it by June 12th. This is due to a security breach involving two OpenAI employee devices. Here's the thing: The issue stems from a security problem with open-source code used by the company. OpenAI says there is no evidence that user data was accessed or that its own systems were compromised. However, a third-party firm was engaged for investigation and response. What happened is that a widely used open-source library, TanStack, was compromised on May 11, 2026 UTC, as part of a software supply chain attack. Two employee devices were impacted, leading to unauthorized access and credential exfiltration from a limited set of internal source code repositories. The bottom line is this code includes the ability to sign certificates for OpenAI products. The company is revoking existing certificates, which means a forced update for the Mac app. No action is needed for iOS or Windows apps. You just need to update when prompted. This matters because it ensures the security of your ChatGPT Mac application.