The splash screen is 'larger' than the screen, resulting in it going through the borders of the screen and being off-centered when using Metal API with Unity 5.6 when resolution is above 1920x1200 (highest scaled desktop resolution on MacBook with Retina display). Choosing smaller resolutions results in black borders around the splash screen when in full screen mode.

Steps to reproduce:
1) Create a new project.
2) Build for macOS with Metal as the Graphics API.
3) Launch the build with resolution above 1920x1200.

Only a part of the splash screen is shown; selecting smaller resolutions with full screen mode results in black border surrounding the splash screen. This does not occur with OpenGL as the Graphics API. Also happens on AMD/Intel/NVidia GPUs.

Reproduced on:
5.6.0a2 - 5.6.0a6 (splash screen doesn't show up at all on 5.6.0a1)

Did not reproduce:
5.5.0f3