Network Connection Failed Repeatedly – No Response in Diagnostics

Support Bug Reports
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Hey, thanks for the report.

The fact that even older versions don’t work suggests something external is blocking Cursor’s connections, like an antivirus, firewall, or other security software.

A couple things to try:

  1. Check the macOS firewall: System Settings > Network > Firewall. Make sure Cursor is allowed, or temporarily turn it off to test.

  2. Security software: Do you have Little Snitch, CleanMyMac, corporate monitoring software, or any MDM profiles installed? We’ve seen a similar case caused by a conflict between corporate monitoring software and Cursor: Cursor Connection Failing Only on My MacBook Pro - Machine Specific Issue

  3. Disable HTTP/2: App settings Cmd + , > search for “HTTP/2” > enable “Disable HTTP/2”

Can you share what security software or firewall you have running? That’ll help narrow it down.