Enable/fix macOS WiFi roaming (802.11k, 802.11r, 802.11v)

Enable macOS WiFi roaming.sh

# 1. Enable roaming
sudo defaults write /Library/Preferences/com.apple.airport.opproam enabled -bool true

# (Optional) Un-disable roaming
#sudo defaults write /Library/Preferences/com.apple.airport.opproam disabled -bool false


# 2. Prefer networks with stronger signals
sudo /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport en0 prefs JoinMode=Strongest

# (Optional) Set a fallback mode (Prompt, JoinOpen, KeepLooking, DoNothing)
#sudo /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport en0 prefs JoinModeFallback=Prompt


# 3. Power cycle WiFi interface
networksetup -setnetworkserviceenabled 'Wi-Fi' off
networksetup -setnetworkserviceenabled 'Wi-Fi' on

Settings.sh

# Check current settings

# Roaming settings
defaults read /Library/Preferences/com.apple.airport.opproam


# AirPort preferences
/usr/libexec/PlistBuddy -c 'Print :Sets:<ID>:Network:Interface:en0:AirPort' \
    /Library/Preferences/SystemConfiguration/preferences.plist 

# Or manually check <ID> → Network → Interface → en0 → AirPort → <JoinMode, etc.> with:
#defaults read /Library/Preferences/SystemConfiguration/preferences Sets

Undo Changes.sh

# To undo above changes
# (Careful with this!)

#sudo defaults delete /Library/Preferences/com.apple.airport.opproam enabled

#/usr/libexec/PlistBuddy -c 'Delete :Sets:<ID>:Network:Interface:en0:AirPort:JoinMode' \
#    /Library/Preferences/SystemConfiguration/preferences.plist