• I want to try a bootable usb stick but as i don’t have a running sierra mac only M1 macs it’s impossible to make an external boot drive

    Not true, you just need to codesign the createinstallmedia binary, like this:

    codesign -s - -f createinstallmedia
    

    This command has to be run inside the Contents/Resources folder in the Install macOS Sierra app, so you need to pop this into terminal first:

    cd /Applications/Install\ macOS\ Sierra.app/Contents/Resources/
    

    You'd need to install XCode command line tools first (so basically do these backwards once you've downloaded Sierra)

    xcode-select --install
    

    If you don't want to use terminal, Install Disc Creator might work, but I don't know if it will run on an M1 mac:
    https://macdaddy.io/install-disk-creator/

    Sierra download link, open it in Safari if you have any issues:
    http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f365f4-0015-4c41-9f44-39d3d2aca067/InstallOS.dmg

    Use a decent quality/more modern USB or things can fuck up.

  • Thanks, only just seen this, will investigate.
    Hopefully my partner can remember her password for an old iMac to make the job easier but i’m not sure what OS it’s running.

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