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Creating Sierra USB installer from Catalina.

Joined
Dec 12, 2016
Messages
19
Motherboard
Dell OptiPlex 3010
CPU
Core i5-3470@3.2GHz
Graphics
ASUS GeForce GT 730
Mac
  1. MacBook Pro
  2. Mac Pro
Mobile Phone
  1. Android
I need to ricreate a USB stick with macOS Sierra installer and I tried to do it using Unibest 7.1.1. and my archived macOS Sierra install application that I placed in my Application folder, but when it comes the moment to select the OS, icon in Unibest appears faded as Unibeast can't find the install application, and I can't go on. What I'm wrong? Maybe I've renamed the install application, but what's the original name? Should I download it again from Apple? It seems not available anymore...
Screenshot 2021-08-06 at 08.32.00.png

EDIT: I found that the problem was the renaming of the installer application. After renamed it to "Install macOS Sierra.app", Unibeast was able to go on. Now I'm waiting it completes his job.
 
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