I have a 'hack (GA-B75M-D3P, Core i5-3570K, 8GB Corsair RAM, built-in HD4000 graphics, etc, no other cards installed, built-in audio/Ethernet/USB, etc.) running 10.9.4. Works perfectly. I added a Syba PEX30016 PCIe Firewire card (TI chipset), that at least one Amazon reviewer identified as...