Here is an issue that started with 10.9.3. My Mac Pro 5,1 in the sig. never shuts down on the 1st try. It restarts instead, just as if I had selected restart. It does this 2-4 times before the command takes hold and actually shuts down fully to power off. I tried ejecting/unplugging all external drives/devices but it makes no difference. It's pretty annoying when I'm remotely connected and need to power off. Any suggestions? Anyone else with this problem?