It started to happen around a month ago, first of all, the Cursor IDE became super slow, I’ve reloaded the window as usual, but the window was just blank. I can see the file names, but everything just loads infinitely, no extensions, no terminal, nothing works. Reload the window does not help.
Sometimes it just resolves by itself after waiting for really long time, I’ve tried to reinstall and clean the data, but nothing really helps, and it becomes really annoying to work with Cursor.
No info in output, problems or whatsoever.
If I try to ask something in the Cursor window, it just infinitely plans the next move.
Hey, this is a known bug: ERROR_EXTENSION_HOST_TIMEOUT. The extension host can’t finish initializing, and the agent ends up stuck on “planning next move”. On macOS it happens more often, especially after 3.2.11. I can’t share an ETA for a fix yet.
What you can try right now:
Logout + login: one user with the same symptom said this was the only thing that helped after reinstall didn’t work. Cursor Settings → Sign out, then sign in again. Windows loading - nothing works
Reset cache: close Cursor, rename or delete ~/.cursor (you can back it up first), then start Cursor and log in again.
Start without extensions: from Terminal run cursor --disable-extensions. This helps confirm if a specific extension is causing it.
Downgrade: if nothing helps, manually install the previous stable version while the issue is active.
To debug faster, please share:
macOS version Apple menu → About This Mac and Cursor version Help → About if Settings won’t open
Help → Toggle Developer Tools → Console and the first errors that show up when the window loads
~/Library/Application Support/Cursor/logs/ content, especially the latest main.log
