Best Low-Mid Range CPU and Motherboard to Pair with a GTX 1060 6GB?

I'm planning my first PC build and I'm hoping to run macOS and Windows on it. I'm thinking of using a GTX 1060 6gb, and was wondering what CPU and motherboard I should use with it? I was looking at the i5 8400, the i5 6600k, or even lower tier ones. I'm not sure which one will let the 1060 run free, but also not have too much wasted CPU capacity. I'm pretty much a noob in PC building for the time being so I'm also wondering what mobo I should pair with the chosen CPU. Thanks guys