How to block bluetooth device that spams me with pairing requests?
The GUI way

Press and hold together the Option + Shift (⌥ + ⇧) and the click the Bluetooth icon in the topbar.

A Debug submenu will appear as shown below:


You get the options to Remove all devices and Factory reset all connected Apple devices — pick whichever you need.

The terminal way

Open terminal and type:


sudo rm /Library/Preferences/com.apple.Bluetooth.plist Enter
rm ~/Library/Preferences/com.apple.Bluetooth.plist Enter
Reboot OSX.


The commands above will remove the MAC addresses of the 'remembered' bluetooth devices from the systems settings. If you want to have a look at the actual contents of those files copy the original file to a user-writable folder and then do: 

plutil -convert xml1 com.apple.Bluetooth.plist, 

and then open it with a text editor (it is an XML file). 

To convert it back to binary use 

plutil -convert binary1 com.apple.Bluetooth.plist.