Issue Description
Mac fails to connect or keeps disconnecting from Wi-Fi networks.
Common Causes
- Corrupt network preferences
- Router incompatibility
- macOS bugs
Step-by-Step Solution
Step 1: Restart Wi-Fi Interface
- Toggle Wi-Fi OFF/ON
- Restart router
Step 2: Forget and Rejoin Network
- System Settings → Wi-Fi
- Click network → Forget
- Rejoin and enter password
Step 3: Renew DHCP Lease
- Wi-Fi → Details → TCP/IP
- Click Renew DHCP Lease
Step 4: Reset Network Settings
- Delete Wi-Fi plist files from:
/Library/Preferences/SystemConfiguration
Explore Further
- Change router channel
Prevention & Best Practices
Avoid public DNS misconfigurations.