OS X update 10.10.5 not working
Using the App Store update app is not working. To the right of OS X update 10.10.5 is the UPDATE button. When I click that button I get a prompt that says "Restarting Your Computer" Your computer will restart in x seconds to install updates. When x gets to zero the App store button starts jumping and when I click it I get a new prompt that says "Available updates have changed" Click "Show details". Which I do. Then the prompt disappears and nothing else happens. The App Store update app still shows that I have an update available. ???
It also shows that I need to update iTunes to version 12.2.2 but below it shows that I have already updated iTunes 12.2.2. ???
MacBook Pro with Retina display, OS X Yosemite (10.10)