I am trying to install FCP 7 on my iMac. After I run the entire install I get a white box in the Viewer and Canvas window. The only time time I can see the correct image in the canvas is when I change the the canvas settings to anything other then black. For example, white, checkerboard 1, checkerboard 2.
It was set to RGB. But I found a solution, not sure if it temporary. System Prefs > Displays > Color> changes millions to thousands, and then back to millions. It seemed to work, although I'm a bit flabbergasted.