This is going to sound weird, but I experienced something very similar. In my case, it wasn't a white screen rather a very large window covering the entire monitor. It could not get it to go away as it wasn't showing up anywhere I could kill it. I used the force quit application and killed the window and my desktop works fine.
This is going to sound weird, but I experienced something very similar. In my case, it wasn't a white screen rather a very large window covering the entire monitor. It could not get it to go away as it wasn't showing up anywhere I could kill it. I used the force quit application and killed the window and my desktop works fine.