Apple Afterburner To get even better video performance for the most demanding workflows, consider upgrading your Mac Pro with Apple Afterburner, a PCIe accelerator card that offloads the decoding of ProRes and ProRes RAW video codecs in Final Cut Pro X, QuickTime Player X, and supported third-party applications. If you purchase Afterburner for your Mac Pro, it will come preinstalled in PCI Express slot 5 (x16) to enable maximum performance.