OpenAI rotates macOS certificates

OpenAI said on April 10 that it revoked and rotated the certificates used to sign its macOS apps after a tainted developer dependency touched its app-signing workflow. (openai.com) The company said a GitHub Actions workflow downloaded a malicious Axios package on March 31, 2026, during the process used to sign ChatGPT Desktop, Codex, Codex command-line interface, and Atlas for Apple computers. (openai.com) A signing certificate is the digital stamp that tells macOS an app really came from its stated maker. OpenAI said it found no evidence that user data was accessed, its systems or intellectual property were compromised, or its shipped software was altered. (openai.com) OpenAI said all macOS users must update to newly signed versions, and that older versions will lose updates, support, and possibly functionality after May 8, 2026. The earliest versions signed with the new certificate are ChatGPT Desktop 1.2026.051, Codex App 26.406.40811, Codex command-line interface 0.119.0, and Atlas 1.2026.84.2. (openai.com) The company said it hired a third-party digital forensics firm, reviewed past notarizations tied to the old certificate, and worked with Apple so software signed with the previous certificate cannot be newly notarized. (openai.com) Two days earlier, OpenAI also changed how larger organizations pay for ChatGPT. Its help center says that, as of April 2, 2026, ChatGPT Business and ChatGPT Enterprise now offer two seat types: a standard ChatGPT seat and a Codex-only seat. (help.openai.com) OpenAI said those plans can now use shared credits for features including Deep Research, Thinking models, image generation, Advanced Voice, and Codex, with Business users drawing from that pool after they exceed per-seat limits. The company also said Codex pricing moved to token-based billing for new and existing ChatGPT Business customers and for new ChatGPT Enterprise customers. (help.openai.com; help.openai.com) The Edu plan is only partly in that pricing shift. OpenAI’s pricing article says Edu customers can use credits for advanced features, but the new Codex-only seats are “not available” to ChatGPT Edu, Teachers, or Healthcare plans, while the Enterprise help page says the new Codex seat changes are “not applicable currently” to Edu. (help.openai.com; help.openai.com) At the same time, OpenAI is fighting Elon Musk in court ahead of an April 27 trial over his 2024 lawsuit against OpenAI and Microsoft. Bloomberg reported that OpenAI accused Musk in a Friday filing of a last-minute “legal ambush” after he changed what he was seeking just weeks before trial. (bloomberg.com) Bloomberg said Musk’s new proposals would send any money won at trial back to OpenAI, unwind OpenAI’s conversion, oversee future financings and transactions, and remove Chief Executive Officer Sam Altman from leadership roles. OpenAI and Microsoft have denied wrongdoing. (bloomberg.com) The result is three separate April deadlines for the same company: update Mac apps before May 8, adapt to new workplace billing that started April 2, and prepare for a courtroom fight set for April 27. (openai.com; help.openai.com; bloomberg.com)