The situation: I have 75 Mbit/s at home, everything’s fine on mobile wifi, but on the MacBook Air everything is very sad: all of a sudden for no reason, literally 1 Mbit/s. Symptoms: I start the SpeedTest - it starts at 10, immediately goes down to 1 mbps and even lower.
It’s not related to browsers since I installed the SpeedTest application separately, it’s the same there.
What I tried:
disabled the built-in firewall. No effect
flush dns, No effect
deleted configuration files 1. com.apple.airport.preferences.plist 2. com.apple.network.eapolclient.configuration.plist 3. NetworkInterfaces.plist 4. preferences.plist - rebooted. No effect
the router rebooted a million times, but this is clearly not it, because everything is fine on the mobile
What else to reset/check I'm rocking my brain. NVRAM / PRAM?