What's happend with PS?

[mikaels71195823]

I have a friend who's Photoshop is spooky, the background is gone and he sees other sites, programs or his desktop trough PS. He has latest PS 21.1.1 and it's on a mac.

[davescm]

Try

Window >Application frame

Dave

[mikaels71195823]

He has tried with that nothing happened at all.

[davescm]

It should do . That is what checking "application frame" is designed to do on a Mac.

See here:

https://blogs.adobe.com/jkost/2019/01/photoshop-ccs-application-frame.html

If you are not seeing any difference try resetting your workspace from the drop down menu at the right of the options bar

Dave

[jane-e]

"He has tried with that nothing happened at all."

What you are showing is how PS works when the Application frame is off, making it more like the Mac interface. Turning on the Application frame to make PS work like a Windows application is the only way to change it, as Dave has correctly said. 

If nothing happens when you turn the Application frame on, the only other solution is to go to the Photoshop menu > Preferences > General > Reset Preferences on Quit. First, though, back up anything you have customized, such as Action sets, gradients, layer styles, etc.

~ Jane

[mikaels71195823]

OK thank you I will tell him that.