it's not because of hardware acceleration at all. It's actively preventing the window to be captured (I believe iTunes does some similar). It uses a private API

it's not because of hardware acceleration at all. It's actively preventing the window to be captured (I believe iTunes does some similar). It uses a private API and an example is here: https://github.com/heardrwt/RHAdditions/blob/master/RHAdditions/NSWindow%2BRHPreventCaptureAdditions.m https://github.com/heardrwt/RHAdditions/blob/master/RHAdditi...