Not clear at all what you mean.
Is it that you don't see the menu bar? Can't you see File > New?
Or are the palettes missing? If the latter, try pressing the Tab key.
Otherwise, please elaboratre.
I have to admit that I only have experience with Mac OS through Snow Leopard. I've stayed away from the smelly lions.
I have this problem, not between Adobe apps, but mostly when I run Firefox and Adobe Apps. Most of the time, switching from Firefox to Photoshop does as you describe: Photoshop comes forward, but the Top of the screen still says Firefox with its menu commands. This happens with other non-adobe apps as well. It's an OSX issue. The workaround is to choose the app you want to use from the Dock.
In some cases, when running 32-bit apps (booted in 64-bit, OS 10.6.8), even the Dock doesn't work; I must first QUIT FIrefox to actually use the 32-bit app.
It's always something. :+)
Everything is there, except you can't close or minimize the windows, or choose tools or open or import etc.
Yesterday I noticed it happening again, only this was while I was in After Effects clicking on an image in photoshop to edit it. No such luck. Strange thing is, it seems to happen randomly. I tried to reproduce the effect again with After Effects today by clicking on an open image in photoshop from the After Effects interface and it didn't do it. Sometimes it works, sometimes it doesn't...there is no rhyme or reason. Anytime I notice it, I take notes and the next day I try to reproduce it using the same situation as when it occured...and it doesn't happen for some reason.
Cuckooo, cuckooo, cuckooo....
I'm going crazy.