Cursor 2.3.34 cannot work on Mac

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

After upgrading cursor version from 1.7x to 2.3x, my cursor IDE cannot work anymore.

  • Cursor version
    Version: 2.3.34
    VSCode Version: 1.105.1
    Commit: 643ba67cd252e2888e296dd0cf34a0c5d7625b90
    Date: 2026-01-10T21:17:10.428Z
    Electron: 37.7.0
    Chromium: 138.0.7204.251
    Node.js: 22.20.0
    V8: 13.8.258.32-electron.0
    OS: Darwin arm64 24.6.0
  • Issues
    1. Extension host terminated unexpectedly 3 times within the last 5 minutes.
    2. When asking anything in AI pane, it got stuck in Planning next moves.
    3. Network Diagnostics running got stuck in DNS, HTTP/2 and SSL, never finished.

Steps to Reproduce

  1. Every time you open cursor.
  2. Every time you ask anything in AI pane.
  3. Every time you run Network Diagostics.

Screenshots / Screen Recordings

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.3.34
VSCode Version: 1.105.1
Commit: 643ba67cd252e2888e296dd0cf34a0c5d7625b90
Date: 2026-01-10T21:17:10.428Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

Yes - Cursor is unusable

2 Likes

Same on the windows

Hey, this is a known issue in version 2.3.34, and the team is already working on a fix. Try this workaround:

  1. Open Cursor Settings CMD + ,
  2. Search for “HTTP/2”
  3. Turn on “Disable HTTP/2”
  4. Restart Cursor

This should fix all three issues: extension host, agent, and network diagnostics. Another user with the exact same errors confirmed that switching to HTTP/1.1 helped: Connection Error after upgrade to Cursor 2.3.34

If everything works after that, let me know. If it still doesn’t, please share a screenshot of your settings and the Network Diagnostics results after the change.

Thanks, Dean, but it doesn’t work at all, I remember that these issues happened after 2.x, that was also why I kept using 1.7x before.

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