Manas Malla Posted April 26, 2019 Share Posted April 26, 2019 (edited) 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 and installed High Sierra on my PC and it worked. but later I tried to create usb for Sierra using 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 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 Edited April 26, 2019 by Manas Malla Link to comment Share on other sites More sharing options...
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