Fresh install of CFE, not an upgrade.
UI elements are aligned to screen edges/corners as they would be on a smaller display.
CFE is ticking over using 3-4% of the CPU, not doing anything particularly obvious. Time continues to update sanely.
cmd-opt-esc causes it to quit immediately.
HTH, happy to try anything new you come up with.
Oh, also it looks like you might have an obi-wan with the left side of your buttons; there's a thin white stripe between the left half-circle and the button body itself.