![]() I have both High Sierra and Mojave installed because I still have 32 bit programs and Catalina won't support 32 bit programs. ![]() ![]() However, when booting my MacPro 2010 with 5.1 firmware, I see nothing until it displays the log in screen. 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.
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