What Operating System(s) are you seeing this problem on?

macOS

Which Wayland compositor or X11 Window manager(s) are you using?

macOS 15.4

WezTerm version

wezterm 20250320-072107-a8735851

Did you try the latest nightly build to see if the issue is better (or worse!) than your current version?

Yes, and I updated the version box above to show the version of the nightly that I tried

Describe the bug

After upgrading my system to macOS 15.4 beta, WezTerm freezes immediately upon launch with 100% CPU usage. Initially, I thought this might be related to issue #6738 , but now I believe it may only be partially related or possibly a separate issue altogether. Since macOS 15.4 has now reached Release Candidate status, I'm creating this new issue to track the problem.

To Reproduce

The issue is consistently reproducible: WezTerm freezes immediately whether launched via command line from another terminal or by clicking the application icon. I've attempted to troubleshoot by removing all configurations and launching with the -n flag, but the freezing persists in all scenarios.

I'm not certain what debug information would be most helpful, but I'm willing to provide any necessary details to assist with resolving this issue. Currently, WezTerm is completely unusable for me, which is particularly frustrating as it's my preferred terminal emulator.

Configuration

no config

Expected Behavior

No response

Logs

> wezterm -n
2025-03-26 23:38:29.315 wezterm-gui[5106:10413722] NSKeyBindingManager: Bad key binding selector for '^$/' = 'redo:'
2025-03-26 23:38:29.315 wezterm-gui[5106:10413722] NSKeyBindingManager: Bad key binding selector for '^x' = '{
    "[" = "pageUp:";
    "]" = "pageDown:";
    u = "undo:";
}'
2025-03-26 23:38:29.315 wezterm-gui[5106:10413722] NSKeyBindingManager: Bad key binding selector for '^/' = 'undo:'
fish: Job 1, 'wezterm -n' terminated by signal SIGTERM (Polite quit request)

Anything else?

No response