Cursor 3.7.27 Agent Broken on macOS 27 Beta (Darwin 27) cursor-retrieval spawn failed: Unknown system error -86

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yeap, Try these steps in order:

  1. Install Rosetta 2 (most common fix): Open Terminal and run:

    softwareupdate --install-rosetta

    Then restart Cursor.

  2. Remove quarantine attributes: Fully quit Cursor and run:

    xattr -cr /Applications/Cursor.app

    Then relaunch.

  3. Disable Instant Grep indexing: Cursor Settings > Indexing & Docs > turn off “Index Repositories for Instant Grep (BETA)”, then restart Cursor. The -86 errors often originate from the retrieval extension this feature uses, which matches your console output.

  4. Try a clean profile: Run cursor --profile-temp from Terminal to rule out any configuration conflicts.

  5. Clean reinstall: If your previous reinstall didn’t involve fully deleting Cursor from Applications first, try that now and download a fresh copy from Cursor · Download.