crwdns2934241:0crwdne2934241:0 Jopabone

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Mac pro 5,1 metal upgrade not flashed

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I upgraded my mac pro 5,1’s gpu from ati radeon hd 5770 to radeon rx 570 and when i upgraded it its not booting to high sierra and it takes me to macos utilities and it wont let me boot into my 120gb ssd

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Mac Pro 2009-2012

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open