I bought a GTX 1070 video card from MacVidCards last July. It worked for about a 2 weeks and then I ran Windows 10 on my Mac Pro. When I swapped drives back to Mac OS, the video card would not boot the system. It now only works when booting Windows 10. I’ve emailed about 7 times, called, etc....no response. No support at all since last July. I guess I’m out $730 bucks. Anyone know how to fix this? Does Running Windows on a flashed video card delete MacVidCards firmware? Help! Thanks!!