How to change the GPU that you boot into.

Hi guys, i am new to this. I have a Z490-G from ROG and i5-10400 and I am not very sure how to boot with a specific GPU. I have an RX 570 4GB from ROG STRIX and a GTX 1060 from Palit. I wanted to know how to use the RX 570 only without unplugging the GTX 1060 so that I am able to boot into Mac. Any tips? 
submitted by /u/kurutogaadvance
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