On some machines Create's rotating blocks — cogwheels, shafts, anything that spins — draw as broken geometry. It has been reported on macOS, and upstream tracks the same fault against Intel integrated graphics.
The block itself is fine. Right position, right hitbox, still working, still turning your machine. Only the spinning copy drawn on top of it is wrong, and it is wrong in both of Create's render paths: Flywheel's instancer draws it as thin slivers, and with the backend off Create's own renderer draws it several times oversized and blown apart.
This mod stops that copy being drawn, so the block renders as its ordinary model instead.
config/createmacfix-client.toml.