xlidoni Posted October 4, 2020 Share Posted October 4, 2020 Hello guys, X79 2x E5 2658v2 64GB RAM RX 460 0C 0.6.1 Mojave I've a strange problem.. I can't boot with USB 2.0 ports, i get: AppleUSBHostPort::disconnect: persistent enumeration failures & prohibited sign. But if i try to boot with a 3.0 Port, im able to view Installer. But keyboard & mouse, are OFF. I tried USB inject all and XHCI unsupported, but the result doesn't change Rename EUSB to EH01 Rename USBE to EH02 Same issue. Any solutions? Thanks. Link to comment https://www.insanelymac.com/forum/topic/345351-x79-usb-problems/ Share on other sites More sharing options...
macattackjack Posted November 3, 2020 Share Posted November 3, 2020 Which brand motherboard? If I remember correctly, which I don't think I do, the issues you're having a issue for me with an install, but I don't remember which motherboard or system. You need to make sure legacy USB is enabled in the BIOS, or try with it off. As a general rule, I needed to always boot from the USB 2 port, as the 3.0 ports don't kick in until later Also recently, I was doing a Non UEFI build of 10.15.5 on an older motherboard, and a MSI board worked perfect, but the Asus board couldn't get USB 3 But all of my 10.14 builds were with Clover, so beyond the obvious, I can't say much more. Link to comment https://www.insanelymac.com/forum/topic/345351-x79-usb-problems/#findComment-2742934 Share on other sites More sharing options...
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