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Wait until the terminal displays "Install media now available". 5. Perform the Clean Installation

Click in the top-left corner and select Show All Devices . Wait until the terminal displays "Install media now

If you are looking to perform a clean installation of macOS 10.15 Catalina If you are looking to perform a clean

Wait until the terminal window displays "Install media now available." Step 5: Execute the Clean Installation Process That is your golden image for a clean installation

Enter your admin password, type y when prompted, and wait 10–20 minutes.

To help refine the next steps, let me know the you are upgrading, the current operating system version running on it, and if you encounter any specific terminal error messages during setup. Share public link

Once downloaded, right-click the PKG and select "Show Package Contents" → locate InstallESD.dmg . That is your golden image for a clean installation.