I just randomly picked a date two years back: date 0416218002018. Set the date back in time when the installer should be working. In the menu, select Utilities and then Terminal. A simple hack worked for me, thanks to this video on YouTube. Sierra USB is a simple app that allows you to quickly create a USB device or a bootable USB support with OS X 10.12 macOS Sierra inside. I have tried 3 different USB sticks, a 500 gigabyte hard drive, a partition on my own Mac, all to no avail. From there any attempts to get the OS working is futile. Open Terminal, which is in the Utilities folder of your Applications folder. Use the 'createinstallmedia' command in Terminal Connect the USB flash drive or other volume that you're using for the bootable installer. You will run into an issue during installation when the installer will say it is damaged. I have tried several times to create a bootable Sierra USB drive, but get the same result every time. You will create the bootable installer from this app, not from the disk image or. Press Y to confirm when asked to format the volume. Run the command /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes// -applicationpath /Applications/Install\ macOS\ Sierra.app/ (Replace with your actual volume. Open Terminal and write sudo su, and enter your password when asked. Mount the DMG file, and copy the Installer macOS Sierra.app file to /Application
#Macos sierra bootable usb pro
I am using a 2017 MacBook Pro with Catalina, and the solution is a combination of a similar resolved issue on iFixIt forums and using unofficial downloads of the macOS Sierra DMG file. Libc++abi.dylib: terminating with uncaught exception of type NSException" *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Couldn't posix_spawn: error 35' (The drive I am trying to use is called 'Backup' and has been erased to become a 'macOS Extended (Journaled)' type drive.)Īfter entering my password and waiting for about two minutes I receive this error:
Sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/Backup -applicationpath /Applications/Install\ macOS\ Sierra.app I have tried to follow these instructions but they haven't worked.
#Macos sierra bootable usb install
I have tried to create a bootable installer for macOS Sierra to use on my MacBook Air that is broken and needs to reinstall macOS (The macOS X Lion installer that comes with the Macbook is broken and says it is unable to install additional components needed to install macOS).
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