  Apple Mac Pro AMD Sapphire Nitro RX480 4GB PCI-E Video Card RX 580 480

System requirements:

- Apple Mac Pro 4,1 (2009) or Mac Pro 5,1 (2010-2012)
- installed macOS 10.13.4 (High Sierra) or newer

System requirements:

- Apple Mac Pro 4,1 (2009) or Mac Pro 5,1 (2010-2012)
- installed macOS 10.13.4 (High Sierra) or newer
- native support by macOS High Sierra, Mojave, 

For Catalina, Big Sur, Monterey or higher

(any version of OSX above Mojave requires you to use Opencore Legacy Patcher

as later versions of OSX are not officially supported but work)

Key features:
- compatible with macOS and Windows (via BootCamp)
- supports Apple boot screen (grey screen with Apple logo on startup) on all ports (also on 4K displays)

- supports PCI Express 2.0 link under macOS and Windows

- supports three displays simultaneously: 

2x HDMI

2x Display Ports

Fastest RX580 4GB with Apple Alt Boot screen.

- supports 4K@60Hz via DisplayPort via HDMI Port
- supports OpenGL, OpenCL and Metal in applications and games
- allows an upgrade to macOS Mojave 10.14 or macOS Catalina 10.15
- supports sound via HDMI under macOS (from macOS 10.14 or above)

You will receive a perfectly working video card, with power cable & install guide