User reports intermittent Safari capture failures in Codex Computer Use
A Reddit user reports intermittent Safari capture failures while using Codex Computer Use on a Mac mini M4, citing SCStreamErrorDomain errors -3811 and -3812. The user says restarting the helper and reconnecting temporarily restored operation, but the failures later returned, and no underlying cause was established.
The report identifies a potentially disruptive reliability issue in an AI agent’s computer-control workflow, but it remains an unverified single-user account rather than evidence of a widespread defect.
Anyone else getting Safari capture failures with Codex Computer Use on Apple Silicon? I’m on a Mac mini M4, macOS 27.0.1, with ChatGPT desktop app 26.1021.31345 and Computer Use build 1001631.
Trying to use Safari fails with:
SCStreamErrorDomain -3811: Failed to start stream due to audio/video capture failure
Screen recording and device control permissions are enabled for Codex Computer Use. Restarting the apps didn’t fix it. During troubleshooting, the macOS capture log reported TCC Allow, then failed while creating the screenshot. The helper logs also showed a failed display lookup for an off-screen window. That’s what the logs showed; I don’t know the underlying cause.
Restarting the Computer Use helper and bringing a normal Safari window onto the main display briefly restored control and screenshots. It was able to complete a posting task, but capture later failed again with:
SCStreamErrorDomain -3812: Failed due to an invalid parameter
The later log said: contentRect does not contain sourceRect. Restarting the helper and reconnecting let it continue again, so this is intermittent, not a lasting fix.
Separately, the ChatGPT Mac interface sometimes freezes while voice mode keeps talking and responding. I can’t switch chats or click options when that happens. I’m not assuming that freeze and the Computer Use capture failure have the same cause.
Has anyone found a stable fix for either issue? What Mac, macOS version, and app version are you using? I use these apps for work, so a reliable workaround would help.
I also posted the original combined report here: https://www.reddit.com/r/ChatGPT/comments/1xe5o06/chatgpt_mac_app_freezes_but_voice_keeps_going/