MP 1,1-5,1 How do I flash a Radeon Sapphire Pulse RX580 Vid card to display MacPro 5.1 UEFI Boot screen?

[Bubba Thinks]

Has anyone figured out how to flash a SAPPHIRE Radeon PULSE RX 580 8GB GDDR5 video card so that a MacPro 5.1 will display the Apple logo and startup progress bar and allow you to run options such as internet recovery or choose the startup disk boot options? I have a 2010 MacPro 5.1 and installed a SAPPHIRE Radeon PULSE RX 580 8GB GDDR5 video card which Apple recommends. However, when booting my MacPro 2010 with 5.1 firmware, I see nothing until it displays the login screen. I have both High Sierra and Mojave installed because I still have 32-bit programs and Catalina won't support 32-bit programs. I read that MacVidCards supposedly claim that they can flash this video card so that the MacPro UEFI can be displayed on boot but I also read that this company has been known to ghost customers and unfortunately some never received their video cards back!



I have been a fan of both Apple and this site. Surely someone on here has figured out how to make this work? Any answers will be truly appreciated!



Thanks,

Clayton

 

[tsialex]

Has anyone figured out how to flash a SAPPHIRE Radeon PULSE RX 580 8GB GDDR5 video card so that a MacPro 5.1 will display the Apple logo and startup progress bar and allow you to run options such as internet recovery or choose the startup disk boot options? I have a 2010 MacPro 5.1 and installed a SAPPHIRE Radeon PULSE RX 580 8GB GDDR5 video card which Apple recommends. However, when booting my MacPro 2010 with 5.1 firmware, I see nothing until it displays the login screen. I have both High Sierra and Mojave installed because I still have 32-bit programs and Catalina won't support 32-bit programs. I read that MacVidCards supposedly claim that they can flash this video card so that the MacPro UEFI can be displayed on boot but I also read that this company has been known to ghost customers and unfortunately some never received their video cards back!



I have been a fan of both Apple and this site. Surely someone on here has figured out how to make this work? Any answers will be truly appreciated!



Thanks,

Clayton

The first Mac Pro that support Internet Recovery is MP6,1 (late 2013 Mac Pro). MP5,1 only have the normal Recovery partition. Recovery works with a RX 580 GPU since 10.12.6 release, it just takes time to load the GPU drivers from the Recovery partition, around three minutes, and then the display works.

No need to flash a modern AMD GPU anymore. You can use OpenCore or the recently updated rEFInd boot loaders to have full pre-boot configuration support with your RX 580 without needing to pay for flashing services:

OpenCore on the Mac Pro

This guide explains how to use the excellent OpenCore boot loader to install, run, and update the latest version of macOS on the MacPro5,1, resulting in a clean, unaltered operating system just like on a supported Mac.

forums.macrumors.com

Boot menus for graphics output protocol.(AMD only)see page 13

I compiled Jief_Machak's version of rEFInd, that should have support for initializing graphics cards that have a GOP rom on them. Pretty much any resent graphics card should work. If you don't know what rEFInd is, it's basically a boot manager, Jief said he was not able to boot Windows, but I'm...

forums.macrumors.com

MVC developed and sell flashing services for RX 580 and VEGA GPUs, the firmware is not public nor GPU card is user flashable.