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[Solved] Can’t load installer

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Jul 1, 2015
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Hey guys and gals, I was hoping to get some help. For some reasons I cannot even load the installer for high Sierra. Any advice at all would be amazing. The only boot flag I’m using in this photo is the default flags plus -v. I’ve tried other bootflags such as -x -f and a few other but when I do that it doesn’t get as far as just -v



My system:
i5 8600K
16GB ballistix sport LT
AMD sapphire PULSE RX 580 8GB
Samsung evo 500gb ssd
Gigabyte z370p d3
 

BreBo

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@Atown, please update your profile (personal details) with your Motherboard, CPU and iGPU or Graphics Card(s).
The Rules said:
Profiles are mandatory so that others can assist you.
Change XHCI Hand-off to Enabled in your BIOS.
 

Feartech

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Okay it’s in my profile now sorry
The verbose boot screen shows an incipient "Prohibited entry sign Error"
This is due to a problem accessing files from your USB installer due to some problem with USB port.
The can be from any of the following :
your CLOVER/kexts folder does not have the right kext to support USB Controllers.
Your BIOS setup has a missing option needed for USB controller
Your USB installer Flash drive is inserted in a port that has a tendency to lose Power during boot.
Your USB flash drive may have some defect(rare)

This question has been answered many times in the Forum but only after you can show a "Prohibited Entry Sign" often after a garbled text on screen. Check this ->#2

I expect your Monitor screen to degenerate into displaying just that in a few minutes after the screen you have uploaded.
Relevant early sign is edited from your image and uploaded.
 

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Joined
Jul 1, 2015
Messages
17
Motherboard
Gigabyte Z370P D3
CPU
i5-8600K
Graphics
RX 580
Mac
Mac Pro
Mobile Phone
iOS
Thank you for the information! Enabling XHCI Hand-off allowed me to run the installer. I’m currently installing High Seirra on my SSD I will update in a few minutes and let you guys know if it was successful. Seriously thank you so much for the help!
 
Joined
Jul 1, 2015
Messages
17
Motherboard
Gigabyte Z370P D3
CPU
i5-8600K
Graphics
RX 580
Mac
Mac Pro
Mobile Phone
iOS
High Seirra install was a success! I just used multibeast and completed the post installation. Now I suppose I just need to do a little digging to see what does and doesn’t work. Thank you very much! You guys are the best!
 
Joined
Jul 25, 2012
Messages
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Gigabyte GA-Z77X-UP5 TH
CPU
i7-3770K
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HD 4000+GT 710
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iMac, MacBook Pro
Mobile Phone
iOS
High Seirra install was a success! I just used multibeast and completed the post installation. Now I suppose I just need to do a little digging to see what does and doesn’t work. Thank you very much! You guys are the best!
Thank you for confirming the cause of "Prohibited Entry Error" was from a missing option in BIOS USB controller menu.
Good luck with the rest of Post install tuning.
 
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