Mac OS X
Q: since this update my computer won't shut down?
Posted on Aug 14, 2016 12:12 PM
by Mike Sombrio,Apple recommended
Apple Watch
Force shutdown by holding the power button for 10 seconds then resetting the SMC often cures the problem Reset the System Management Controller (SMC) on your Mac - Apple Support
Posted on Aug 14, 2016 12:18 PM