my mac loses complete wifi connection at around 5pm every day. have called bt to ask why and loss of connection but they have checked everything and its not my internet. my families windows laptops all work just not my macbook pro. any help?
The most obvious explanation is that your AirPort Base Station has been configured for MAC Address Access Control > Timed Access.
Read: AirPort Utility 6.x: Control access to your wireless network
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