Mac under drive bcm20702a0 USB bluetooth

Accidentally high a USB Bluetooth, found under the Mac can identify, unable to drive, went to look for a bit. The method is very simple, is to add the Bluetooth PID and vid into the drive inside, the specific methods and steps are as follows:
1. Go to the/system/libary/extensions directory
2. Backup Iobluetoothfamily.kext
3. Right click on Iobluetoothfamily.kext, select Show Package Contents
4. Enter Contents/plugins
5. Right-click Broadcombluetoothhostcontrollerusbtransport.kext, select Show Package Contents
6. Enter contents
7. Drag the Info.plist to the desktop for modification
8. In the code below, the PID and vid can be modified to the corresponding

<key>pid 8684 0x21ec VID 2652 0xa5c</key> <dict> <key>cfbundleidentifier</key > <string>com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport</string> <ke y>dongles</key> <dict> <key>GMYLE</key> <string>                 Micro nano</string> <key>IOGear</key> <string>GBU-521</string> <key>Kinivo</key> <string>BTD-400</string> &LT;KEY&G T Medialink</key> <string>panbt400 (4.0) </string> <key>medialink 2<                /key> <string>MUA-BA3</string> <key>Plugable</key> <string>4.0 le</string> <key>Targus</key> &LT;STRING&GT;ACB10US 4.0       </string>         <key>UtechSmart</key> <string>4.0 (BCM20702) </string> </dict > <key>IOClass</key> <string>broadcombluetoothhostcontrollerusbtransport</st            Ring> <key>IOProviderClass</key> <string>IOUSBHostDevice</string> <key>idProduct</key> <integer>8684</integer> <key>idvendor</key > <integer>2652</integer> </dict>

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Mac under drive bcm20702a0 USB bluetooth