[Solved] Prohibition icon while installing high sierra

[HessiDude]

Hi,

So installing high sierra was problem free with an earlier version of clover and high sierra. But yesterday I made a new bootable USB with the latest version of high sierra, and now I'm getting the attached error screen with the well known prohibition icon.

The hardware is the exact same as it was when I installed the earlier version of high sierra and the BIOS settings are the same (set after the guide).

Motherboard: ASRock H110M ITX
CPU: Intel Core i5 6400
RAM: Kingston HyperX 2x8GB DDR4
GFX: Nvidia GeForce GTX970 (itx formfactor)
SSD: Samsung 850 EVO 250GB

Please let me know if you know what I'm doing wrong.... I've tried nv_disable=1, without any luck. Altså tried configuring the config.plist with clover configurator, to change SMBIOS's and add DIMM's and dual channel. Nothing helped. Installing OS X El Capitan is installed problem free, but can't update to latest OS after that because the installation boot partition can't be found, and when I update clover and try again, the installation halts at apple logo and ca. 80% loading done.

Thanks in advance.

 

[P1LGRIM]

"Still waiting for root device".
When booting from USB means that there is a problem finding a valid System folder to start up from on your USB flash drive.
This is usually because the flash drive is in a USB3 port.
If this is the case move it to a USB2 port, if it is already in a USB2 port move it to another and try again.
Repeat until you have tried all USB ports.
Use a USB2 flash drive.
If it still doesn't work you could try another flash drive.
You might also try enabling Legacy on your USB3 ports in your BIOS settings.
Try connecting your USB flash drive using a USB2 hub.
Ensure that Fast Boot is not enabled in your BIOS settings.
May require USBInjectAll.kext in /EFI/CLOVER/kexts/Other/.
May need PMHeart’s patch to remove XHCI USB Port Limit to /Volumes/EFI/EFI/CLOVER/config.plist.

The problem may also occur when your USB controllers are unsupported, if this is the case you should add the appropriate kext to /EFI/CLOVER/kexts/Other/ or try GenericUSBXHCI.kext.

 

[HessiDude]

"Still waiting for root device".
When booting from USB means that there is a problem finding a valid System folder to start up from on your USB flash drive.
This is usually because the flash drive is in a USB3 port.
If this is the case move it to a USB2 port, if it is already in a USB2 port move it to another and try again.
Repeat until you have tried all USB ports.
Use a USB2 flash drive.
If it still doesn't work you could try another flash drive.
You might also try enabling Legacy on your USB3 ports in your BIOS settings.
Try connecting your USB flash drive using a USB2 hub.
Ensure that Fast Boot is not enabled in your BIOS settings.
May require USBInjectAll.kext in /EFI/CLOVER/kexts/Other/.
May need PMHeart’s patch to remove XHCI USB Port Limit to /Volumes/EFI/EFI/CLOVER/config.plist.

The problem may also occur when your USB controllers are unsupported, if this is the case you should add the appropriate kext to /EFI/CLOVER/kexts/Other/ or try GenericUSBXHCI.kext.

Thanks for the very detailed reply and instructions, although a bit "too late". While waiting and crossing my fingers for some help (thanks again) I googled some more, and found out that I should try downloading the latest versions of Lilu.kext, USBInjectAll.kext and also GenericUSBXHCI.kext and add them to /EFI/CLOVER/kexts/Other/ of by bootable USB. Also I should try adding darkwake = 8 to boot args.

Did this... and now I at least reach the installer and some reboots.... still in the process of installing.... will get back to you with results.... seems to be going well so far.

Once again... thanks very much. Your help is appreciated.

 

[HessiDude]

So just copying USBInjectAll.kext to /EFI/CLOVER/kexts/Other/ of the bootable USB will do the trick. The problem now is that the system gets slow and very laggy after sleep/wake.