Kext ati 78706/8/2023 ![]() Having the device ID of a specific card in both files is necessary but not sufficient to make it work! Apple will add some device IDs every now and then, and while some of the added cards will actually work, others might have awfully buggy drivers because Apple added the IDs just for testing purpose. ![]() Both types of kexts contain a list of PCI device IDs in their ist to detect and properly initialize connected GPUs. The first is responsible of setting up basic 2D operation, correct resolutions, handling the connection ports of your card (rooting the signals to the correct ports, detecting hot plug actions, handling multiple screens) and others while the latter is mainly responsible for the 3D acceleration of your card. AMD Kernel Extensions The AMD drivers consist of a lot of kernel extensions, two of which are particularly interesting for the (possible) OS X compatibility of a specific GPU: AMD5,6,7,8,9000Controller.kext (one for each AMD Radeon GPU family) and AMDRadeonX3,4000.kext.
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