USBストレージを無効にする

OSX 
sudo kextunload -b com.apple.driver.AppleUSBCardReader
sudo kextunload -b com.apple.driver.AppleUSBODD
sudo kextunload -b com.apple.iokit.IOUSBMassStorageClass

/System/Library/Extensions/AppleStorageDrivers.kext/Contents/PlugIns/AppleUSBCardReader.kext/
/System/Library/Extensions/AppleStorageDrivers.kext/Contents/PlugIns/AppleUSBODD.kext/
/System/Library/Extensions/IOUSBMassStorageClass.kext/