Reinstalling MacOS on mostly authentic Apple hardware

So I have a Mac Pro 5,1 that is all original hardware except for the graphics card (an MSI RX570). It currently has only linux on it, but I would like reinstall MacOS on it. I had planned to boot into the internet recovery mode, but if I hold Cmd+R or Cmd+Option+R while booting the screen remains black until I release the keys, at which point it begins booting the linux installation. Does anyone know how I could get internet recovery mode to boot or if there is another way I can reinstall MacOS?

submitted by /u/bisenhar
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