Mac WiFi Keeps Disconnecting - How to Fix It
Intermittent WiFi drops on Mac are usually caused by one of four things: power management settings, router channel congestion, DNS failures, or a corrupted network preference. Each one has a specific fix.
Fix 1 - Disable WiFi Power Nap
Mac's Power Nap feature can cause WiFi to disconnect when the display sleeps. This is the most common cause of periodic drops.
- System Settings → Battery.
- Turn off Enable Power Nap.
- Also check System Settings → Displays → Advanced → turn off "Prevent automatic sleeping on power adapter when the display is off."
Fix 2 - Switch to 5GHz Band
If your router broadcasts both 2.4GHz and 5GHz on the same network name, Mac may keep switching between them. The 2.4GHz band has longer range but more interference from neighboring networks and Bluetooth devices.
- In your router admin panel, give the 5GHz network a different name (SSID).
- Connect your Mac to the 5GHz network specifically.
- Alternatively: System Settings → Wi-Fi → the network name → set to always use this specific network.
Fix 3 - Change the Router Channel
If many nearby networks are on the same WiFi channel, interference causes drops. Log into your router admin panel (usually at 192.168.1.1 or 192.168.0.1) and set the 2.4GHz channel to 1, 6, or 11 - these are the only non-overlapping channels.
Fix 4 - Fix DNS Timeouts
DNS lookup failures look like dropped connections even when the WiFi link itself is fine. Add reliable DNS servers:
- System Settings → Network → Wi-Fi → Details → DNS tab.
- Click + and add
1.1.1.1(Cloudflare) and8.8.8.8(Google). - Move them above any existing entries.
Fix 5 - Reset Network Preferences
Corrupted preference files cause inexplicable drops. Follow the steps in the Mac won't connect guide (Fix 6) to delete and regenerate the network configuration files.