Cursor Connection Failing Only on My MacBook Pro - Machine Specific Issue

[Micky]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Cursor fails to connect with error: “Connection failed. Please check your internet connection.”

• Works fine on my other devices

• Issue persists across different networks

Steps to Reproduce

Ask any question in agent, no response

Expected Behavior

Should reply

Screenshots

Request ID: 0c697148-1a19-4794-b85f-60d134fb2eda
Canceled
LTe: Canceled
at Hmf (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:9095:37468)
at rpf (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:9096:4395)
at fva.run (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:9096:8170)
at async Hyt.runAgentLoop (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:34196:57047)
at async Zpc.streamFromAgentBackend (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:34245:7695)
at async Zpc.getAgentStreamResponse (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:34245:8436)
at async FTe.submitChatMaybeAbortCurrent (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:9170:14575)
at async Object.Ei [as onSubmit] (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:32994:3808)
at async vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:32968:59730

Operating System

MacOS

Version Information

Cursor IDE:

Version: 2.4.22 (Universal)

VSCode Version: 1.105.1

Commit: 618c607a249dd7fd2ffc662c6531143833bebd40Date: 2026-01-26T22:51:47.692Z (3 days ago)

Build Type: Stable

Release Track: Default

Electron: 39.2.7

Chromium: 142.0.7444.235

Node.js: 22.21.1

V8: 14.2.231.21-electron.0

OS: Darwin arm64 24.5.0

What I have Tried:

• Try a different model the model selector shows only “Auto”(free trial accounts)

• Disable extensions temporarily it doesn’t work

• Run Network Diagnostic the network diagnostic shows all checks passed

[system]

Hi there!

We detected that this may be a bug report, so we’ve moved your post to the Bug Reports category.

To help us investigate and fix this faster, could you edit your original post to include the details from the template below?

Bug Report Template - Click to expand

Where does the bug appear (feature/product)?

• Cursor IDE
• Cursor CLI
• Background Agent (GitHub, Slack, Web, Linear)
• BugBot
• Somewhere else…

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Describe the Bug
A clear and concise description of what the bug is.

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Steps to Reproduce
How can you reproduce this bug? We have a much better chance at fixing issues if we can reproduce them!

1. …
2. …
3. …

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Expected Behavior
What is meant to happen here that isn’t working correctly?

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Screenshots / Screen Recordings
If applicable, attach images or videos (.jpg, .png, .gif, .mp4, .mov)

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Operating System

• Windows 10/11
• MacOS
• Linux

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Version Information

• For Cursor IDE: Menu → About Cursor → Copy
• For Cursor CLI: Run agent about in your terminal

IDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......

CLI:
CLI Version 2026.01.17-d239e66

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For AI issues: which model did you use?
Model name (e.g., Sonnet 4, Tab…)

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For AI issues: add Request ID with privacy disabled
Request ID: f9a7046a-279b-47e5-ab48-6e8dc12daba1
For Background Agent issues, also post the ID: bc-…

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Additional Information
Add any other context about the problem here.

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Does this stop you from using Cursor?

• Yes - Cursor is unusable
• Sometimes - I can sometimes use Cursor
• No - Cursor works, but with this issue

The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!

[sanjeed5 (Sanjeed)]

Hi @Micky, thanks for the detailed report and for all the troubleshooting you’ve already done!

Since this is machine-specific (works on other devices, network diagnostic passes), here are a few things that might help:

1. Disable HTTP/2: Go to App Settings (Cmd + ,) → search “HTTP/2” → enable “Disable HTTP/2”. This resolves many connectivity issues on certain network configurations.

2. Check macOS Firewall: System Settings → Network → Firewall - make sure Cursor is allowed, or temporarily disable to test.

3. Security software: Do you have any security apps (Little Snitch, CleanMyMac firewall, corporate MDM profiles) that might block Cursor’s connections?

Let me know how it goes - happy to help further!

[Micky]

Hi, @SanjeedSanjeed, thanks for the help! Figured it out. The issue was that Cursor was conflicting with my company’s monitoring software. Uninstalled it and now Cursor works fine.

To add to that, the company’s monitoring software is Tianrui Landun.