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How to Create a macOS High Sierra Public Beta Installation USB

Executes a terminal application "createinstallmedia" inside "Install macOS High Sierra Beta" app with options -volume and -applicationpath
 
You may use Geparted linux cd to format you USB : I had same issue.
 
mais_um said:
Code: 
Install macOS High Sierra Beta.app does not appear to be a valid OS installer application.
Try download "macOS Install Data" two times. Install macOS High Sierra Beta is in Applications and macOS Install Data is in the macos root partition.
Any ideas?

Edited: Read some Blog comment that the pen must be named "Untitled". It works, i mean no more the error above. This is on the Public Beta. But new erro:
Code: 
Failed to copy kernelcache, The file “prelinkedkernel” couldn’t be opened because there is no such file.
Click to expand...

That's strange I just made another installer usb drive using the terminal 'Script' as depicted in the guide and had no problems when I used it on my test rig. You must name the usb exactly as stated - meaning if it says name drive 'USB' it must be so, not like this 'usb' (obviously without the quotes).
 
Build 1 (Retired)
Z390 AORUS PRO WIFI |  i7 9700K |  RX 580 Pulse 8GB
mais_um said:
Executes a terminal application "createinstallmedia" inside "Install macOS High Sierra Beta" app with options -volume and -applicationpath
Click to expand...
still doesn't run, always the same message:
Install macOS High Sierra Beta.app does not appear to be a valid OS installer application.
I run the App and installed the "macOS Install Data" on my USB stick. Could this be a workaround for me?
Folderstructure looks like this:
file:///Volumes/USB/macOS%20Install%20Data/
file:///Volumes/USB/macOS%20Install%20Data/AppleDiagnostics.chunklist
file:///Volumes/USB/macOS%20Install%20Data/AppleDiagnostics.dmg
file:///Volumes/USB/macOS%20Install%20Data/BaseSystem.chunklist
file:///Volumes/USB/macOS%20Install%20Data/BaseSystem.dmg
file:///Volumes/USB/macOS%20Install%20Data/index.sproduct
file:///Volumes/USB/macOS%20Install%20Data/InstallESDDmg.pkg
file:///Volumes/USB/macOS%20Install%20Data/InstallInfo.plist
file:///Volumes/USB/macOS%20Install%20Data/OSX_10_13_IncompatibleAppList.pkg
 
AlexiDime said:
still doesn't run, always the same message:
Install macOS High Sierra Beta.app does not appear to be a valid OS installer application.
I run the App and installed the "macOS Install Data" on my USB stick. Could this be a workaround for me?
Folderstructure looks like this:
file:///Volumes/USB/macOS%20Install%20Data/
file:///Volumes/USB/macOS%20Install%20Data/AppleDiagnostics.chunklist
file:///Volumes/USB/macOS%20Install%20Data/AppleDiagnostics.dmg
file:///Volumes/USB/macOS%20Install%20Data/BaseSystem.chunklist
file:///Volumes/USB/macOS%20Install%20Data/BaseSystem.dmg
file:///Volumes/USB/macOS%20Install%20Data/index.sproduct
file:///Volumes/USB/macOS%20Install%20Data/InstallESDDmg.pkg
file:///Volumes/USB/macOS%20Install%20Data/InstallInfo.plist
file:///Volumes/USB/macOS%20Install%20Data/OSX_10_13_IncompatibleAppList.pkg
Click to expand...

Maybe the the down/load is corrupted in your Application folder or on your usb drive.
 
Build 1 (Retired)
Z390 AORUS PRO WIFI |  i7 9700K |  RX 580 Pulse 8GB
I think I got it why it doesn't work: I'm still on 10.11.6 on my Macbook Air. I've read that I need to be on 10.12.5 or above for the proper installer? Can someone confirm this?
 
AlexiDime said:
still doesn't run, always the same message:
Install macOS High Sierra Beta.app does not appear to be a valid OS installer application.
I run the App and installed the "macOS Install Data" on my USB stick. Could this be a workaround for me?
Folderstructure looks like this:
file:///Volumes/USB/macOS%20Install%20Data/
file:///Volumes/USB/macOS%20Install%20Data/AppleDiagnostics.chunklist
file:///Volumes/USB/macOS%20Install%20Data/AppleDiagnostics.dmg
file:///Volumes/USB/macOS%20Install%20Data/BaseSystem.chunklist
file:///Volumes/USB/macOS%20Install%20Data/BaseSystem.dmg
file:///Volumes/USB/macOS%20Install%20Data/index.sproduct
file:///Volumes/USB/macOS%20Install%20Data/InstallESDDmg.pkg
file:///Volumes/USB/macOS%20Install%20Data/InstallInfo.plist
file:///Volumes/USB/macOS%20Install%20Data/OSX_10_13_IncompatibleAppList.pkg
Click to expand...

I fix this issue doing step 2 (download the macOS Public Beta Access Utility)

https://beta.apple.com/sp/betaprogram/redemption#macos
 
Build 1
ROG MAXIMUS X HERO (WI-FI AC) |  i7 8086K |  Vega 64 8GB
yeah that's what I already recommended to others but it doesn't work in my case. I still think it's due to my older OSX version.
 
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