How is linux on the Apple iMac 27” Retina 5K (2017)

I came across an Apple iMac Retina 5K 27-inch (2017) for a really good price, how well does linux work? Specs: - 4.2GHz Quad-Core Intel Core i7 - Upgraded to 64GB DDR4 RAM - Radeon Pro 580 8GB Graphics - 27” Retina 5K Display