I downloaded MacPro2006-2007FirmwareTool which was posted by MacEFIRom from netkas. But the software tells me "This program requires Internet access..." when I run it. I'm sure my Mac Pro 1,1 is connected to the Internet well. After I clicked OK button, the software closed automatically. Have you met this problem? The system is 10.10.5. I tried in 10.7.5 and the result is the same. PS. I have to post a new thread about my problem about 'MacPro2006-2007FirmwareTool'. So more people can see it and I can get some help. Thanks for any advise.