Because the downloaded file is a raw sector-by-sector disk image ( .raw or .dmg ), standard drag-and-drop file transfers will not make the drive bootable. You must use a dedicated flashing application. Download and install the open-source utility .
Safer alternatives
Open your EFI mounting tool and mount the EFI partitions of both your USB drive and your internal macOS SSD. olarila catalina 10157 download new
Core i3, i5, i7, i9, or Xeon.
Select your destination drive, choose , and set format to APFS and Scheme to GUID Partition Map . Close Disk Utility and click Install macOS . 4. Post-Installation (Essential) Because the downloaded file is a raw sector-by-sector
– Look for the "Downloads" or "Images" section. They typically host files on Google Drive or Mega. or Xeon. Select your destination drive