Guest jayhawk1947 Posted April 28, 2022 Posted April 28, 2022 I've had a disaster. I'm upgrading a Mac Pro 4,1. It's been flashed to 5,1, and the EFI has been updated to 144.0.0.0.0. The gpu is an RX570. It is happy to run Mojave. I've bought a dual cpu tray to upgrade from single. Before I updated the EFI to 144.0, I put the new (to me) dual tray in the machine and it booted. I then started to upgrade the chips to 5680's. I'm trying to upgrade without de-lidding the chips. I first updated the EFI to 144.0.0.0.0 from where it was and then... Read more Source: MacRumors
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