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red2211

macrumors newbie
Original poster
Apr 18, 2021
1
0
Recently I bought old Mac mini from 2006 and I want to install 4 gb of ram in it and core 2 duo cpu. I upgraded cpu and then I googled that I need to upgrade the firmware to 2.1 for 4 gb of ram. So I used dosdude1 utility and successfully upgraded to 2.1, all was fine but I decided to install Windows and Linux on it, I installed rEFInd and the problem was that Mac won’t boot from usb drive at all, but when I downgraded firmware I can easily boot from usb. And also on 2.1 firmware when Mac starts I can hear bong sound twice.
How can I solve that problem?

P.S. I’m from Ukraine so sorry for my “perfect” English)
 
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