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. You will run into an issue during installation when the installer will say it is damaged. Press Y to confirm when asked to format the volume.
CREATE A BOOTABLE INSTALLER FOR OS X MAC OS X
mostly for bootable Mac OS X or macOS installation USB.
CREATE A BOOTABLE INSTALLER FOR OS X FOR MAC
Run the command /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes// -applicationpath /Applications/Install\ macOS\ Sierra.app/ (Replace with your actual volume. Create Bootable USB for Mac on Windows 10, Mac and Windows file system is completely different. 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 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. 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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