Macbook can't search forwifi

Mac can't find the wifis at home. We need to turn them offWifiFunction, and then open it, which is usually searched. Wi-fi is an electronic device that allows a connectionWireless lan(wlan)Technology, usually using 2. 4g uhf or 5g shf ism radio frequency bands. Wireless local area networks are usually password-protected; but they are also open, allowing any equipment within the wlan to be connected. Wi-fi is a brand of wireless internet communications technology, held by the wi-fi alliance. The aim is to improve interoperability among wireless internet products based on ieee 802. 11. The local area network using the ieee 802. 11 series of protocols was described as wireless authenticity. It even equates wi-fi with wireless internet (wi-fi is an important part of wlan)。