I can diagnose PC issues, but the Mac is little harder.... This morning I got up to my Mac Pro 3,1 displaying a circle with a slash through it. I tried many boots, booted holding the option key and tried booting with the disk and a bootable install dvd Snow Leopard. It keeps coming back to you need to restart your computer by holding the power button and then pressing it again. I put a new disk in but it will not attempt to load Snow Leopard. I should also note I have an Nvidia GTX 960 card, using a display port connection
Ideas?????
Ideas?????