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Okay so I got no answers but I ended up figuring out myself. I realized that my computer needed the 1.4 EFI update before it could get the 1.5 EFI update provided here for the tool to work and everything to switch over to the 5,1
I’m having an issue that I don’t see mentioned. I have an ‘09 I’ve tried this process several times and it doesn’t seems to want to work. I downloaded the EFI update and the firmware tool. I have followed all the instructions every time but I still have a 4,1 computer. I get to the restart after the blinking power light and tone. It seems like the grey screen flashes for just a second but then stops then restarts and when the computer is back on fully it’s still a 4,1. Anyone have an ideas?
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