Update 2018-001 - USB and Bluetooth nonfunctional

After installing the security update 2018-001 (El Capitan), my Mac Pro no longer has working USB or Bluetooth.  The keyboard and mouse are unresponsive but I can still connect by Screen Sharing and work that way.  The problem persists after reboot and booting from an external HD. 

 

Console has numerous errors like the following:

162661.651535 PRT1@fd100000: AppleUSBHostPort::disconnect: persistent enumeration failures

162725.712117 PRT2@fd200000: AppleUSBHostPort::disconnect: persistent enumeration failures


Mac Pro, OS X El Capitan (10.11.6)
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howapple - hello

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try an SMC reset. It sometimes makes errant hardware straighten up and fly right. There is no downside risk.

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