I'm on Mac OS X El Cap. And I'm using PS CS 6 Extended.
If I switch to Photoshop, and do my work, then try to switch to say Chrome via cmd+tab, Photoshop stays on top.
What might have caused this? Did I accidently click something on my Mac that makes Photoshop float?
How can I fix this problem to have PS behave like any other app in terms of visibility.