I haven't done console development for a long time, but while the console vendors use their own graphics APIs, the GPUs are (more of less) off-the-shelf parts f

I haven't done console development for a long time, but while the console vendors use their own graphics APIs, the GPUs are (more of less) off-the-shelf parts from AMD or NVIDIA, while Apple completely controls both software and hardware side, so at least theoretically they have more flexibility to harmonize hardware and software.