Cause: The Bluetooth function may not be enabled. The device may be damaged, resulting in the inability to perform Bluetooth pairing; It may be that the Bluetooth device has run out of power and can be charged for a while before pairing.
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Apple second control keyboard pairing method: Use the lightning to USB cable to connect the keyboard and the computer, need to ensure that the keyboard power key has been turned on, then open the system preferences page on the Mac computer, turn on the Bluetooth function, and then pair with the keyboard, you can unplug the cable after successful pairing, with high transmission efficiency and high security advantages.
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Through the above pairing method, you can pair the mouse and the computer, there is a power button at the bottom of the mouse, if the device cannot be used, it is recommended to charge for a period of time before use; If your computer's Bluetooth icon turns gray, it means Bluetooth is turned off, and if there is a broken line icon on the Bluetooth icon, it means Bluetooth is offline or unavailable.
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Bluetooth is a radio technology that supports short-range communication of devices (generally within 10m). Bluetooth works in the 2.4GHz ISM (that is, industrial, scientific and medical) band used by IEEE802.11 protocol. As a new short-range wireless communication technology, the development of low rate wireless personal area network is being strongly promoted.
Apple's first generation wireless keyboard display can not be paired for several reasons
1, press and hold the upper right button, see if the green light is blinking in the upper right corner of the keyboard,
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2, no flicker may be out of power, need to change the battery;
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3, see if there is leakage in the battery compartment, this often happens;
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4, see if the computer Bluetooth is off, need to open forever;
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5, reconnect the computer with the keyboard;