Computer Use helper crashes on every click on macOS 27
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- Rust
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Description
What version of the Codex App are you using (From “About Codex” dialog)?
26.826.12353
What subscription do you have?
Pro
What platform is your computer?
Mac OS 27
What issue are you seeing?
macOS 27.0, build 26A5421a
Computer Use helper 26.826.1000901
Clicks fail everywhere
Keyboard commands still work
Crash signature: Window Bounds Observer → _swift_task_checkIsolatedSwift → _dispatch_assert_queue_fail
What steps can reproduce the bug?
Anytime I try to use computer use and they need to click something
What is the expected behavior?
for clicking to work.
Additional information
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the failure in the Computer Use helper on macOS 27, using a click action while confirming that keyboard commands still work. Trace the Window Bounds Observer path associated with the _swift_task_checkIsolatedSwift and _dispatch_assert_queue_fail crash signature. Done means clicks work reliably without the helper crashing.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- macos
- Domain
- desktop, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 50/100