Wi-Fi & Bluetooth

Problem	Fix
Can't connect	Turn Wi-Fi off and on. System Settings > Wi-Fi.
Slow speeds	Move closer to your router. Check for interference from microwaves, Bluetooth devices.
Keeps disconnecting	Forget the network (System Settings > Wi-Fi > click (i) next to network > Forget), then reconnect.
No networks visible	Restart your Mac. If still nothing, restart your router.

Advanced Wi-Fi Fix

1. Open Terminal
2. Run: sudo killall -HUP mDNSResponder (flushes DNS cache)
3. Restart your Mac

Bluetooth Issues

Problem	Fix
Device won't pair	Turn Bluetooth off and on. Remove the device and re-pair.
Audio cutting out	Check battery level on Bluetooth device. Move closer to Mac.
Mouse/keyboard lag	Remove other Bluetooth devices temporarily to test interference.
Bluetooth unavailable	Restart your Mac. If persists, reset Bluetooth module: hold Shift + Opt and click the Bluetooth icon in the menu bar > Debug > Reset the Bluetooth module.