GPU Process sandbox is too strict for CGL on certain hardware Following might be missing for intel/amd switching hardware: (iokit-property "FramebufferEnabled") (iokit-property "FramebufferStarted")
<rdar://problem/71893349>
Turns out this is invalid. When the "allows graphics switching" is turned on in GPU process properties, the WS blocking works as is and there's no sandbox issues.