Guest jsts Posted August 2, 2022 Posted August 2, 2022 Hi, guys! I have a MacPro 4.1->5.1 (2009) + EVGA GTX680 (flashed) + Apple LED Cinema Display 24" DisplayPort + OCLP + Monterey 12.4. In this configuration, the boot screen displays fine, I can control the boot process. I bought (on Ebay) an AMD Radeon RX 6600 XT 8GB from MacVidCards Europe. I turned the Mac off, took the GTX680 out, put the RX6600XT in, and turned the computer back on. However, the monitor screen remained black when booting up until the Monterey was fully loaded. The... Read more Source: MacRumors
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