Guest flyproductions Posted October 29, 2024 Posted October 29, 2024 As the title says: I'm running a Sapphire RX 590 Nitro+ Special Edition in one of my 5,1s, which i recently purchased. The card works perfectly fine in macOS as well as Windows. Even extended benchmarking without any issues. But, while showing the GOP or OpenCore bootscreen, it shows some strange artefacting (see pictures). The green rectangle comes first and after that also the icons of the bootdrives appeare distorted. As soon as the OS comes in, no matter if Win or Mac, the picture turns... Read more Source: MacRumors
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