kextunload difficulty

i trying use bluetooth on virtualbox , understand have stop os x using bluetooth first. instructions doing simple, don't work me:

told execute following 2 commands terminal in superuser mode:
kextunload -b com.apple.driver.broadcomusbbluetoothhcicontroller
kextunload -b com.apple.driver.appleusbbluetoothhcicontroller

first 1 gives following response:
(kernel) can't unload kext com.apple.driver.broadcomusbbluetoothhcicontroller; classes have instances:
(kernel) kext com.apple.driver.broadcomusbbluetoothhcicontroller class broadcom2045familyusbbluetoothhcicontroller has 1 instance.
failed unload com.apple.driver.broadcomusbbluetoothhcicontroller - (libkern/kext) kext in use or retained (cannot unload).

, can't find online tells me next, ideas?

 

Forums Macs macOS Older OS X Versions Mac OS X Lion (10.7)

• iPhone
• Mac OS & System Software
• iPad
• Apple Watch
• Notebooks
• iTunes
• Apple ID
• iCloud
• Desktop Computers
• Apple Music
• Professional Applications
• iPod
• iWork
• Apple TV
• iLife
• Wireless