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Need help installing Sierra

Joined
Feb 6, 2019
Messages
9
Motherboard
Gigabyte GA-H110H-M
CPU
G4600
Graphics
HD 630+GT 710
Mac
iMac
Classic Mac
iMac
Mobile Phone
Android
So a day back I was running Mojave but for my development purpose I needed macOS Sierra and then because I couldn't direct downgrade, I created a high Sierra usb with unibeast and installed High Sierra on my PC and it worked. but later I tried to create usb for Sierra using unibeast in high Sierra, the usb got created and it booted but the installer at about 5min remaining it stopped and got a error message in logs saying that macOS couldn't be installed. Couldn't extract files from Firmware update.pkg and later another time I downloaded and created usb and the macOS Installer gave error couldn't extract files from essentials.pkg.
And I also, I tried creating a MacOS EL captain usb using unibeast as well but it too failed and the macOS installer gave an error - couldn't copy files. So could you help me solve this issue as soon as possible as it is urgent.
Waiting eagerly for a reply.
Mobo - Gigabyte h11m-h
Processor - Pentium g4600
Ram - 8Gb
Nvidia 710 graphic card
 
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