My keyboard and mouse keep disconnecting and re-connecting on my Mac mini. There are no other bluetooth devices close by that are on. HELP! So frustrating.
Why do my bluetooth devices keep connecting and disconnecting.?
Mac mini, OS X 10.10
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USB 3.0 and Thunderbolt 3 devices, with poorly shielded cables and enclosures, can also cause Wi-Fi and Bluetooth issues.
see > Resolve Wi-Fi and Bluetooth issues caused by wireless interference - Apple Support
If removing the USB 3.0 or Thunderbolt 3 device(s) from your setup solves the problem? Then try moving the device(s) farther away from your Mac Mini and Bluetooth devices. If that doesn't help, the try moving the cable(s) to different ports or buy better shielded cable(s).