canuto

    TARGET="/boot/mac"
    SYSTEM="$TARGET/System/Library/CoreServices"
    GRUB64="/boot/efi/EFI/ubuntu/grubx64.efi"

    # required folders for mac efi boot
    mkdir -p $SYSTEM

    # grub boot efi
    cp $GRUB64 $SYSTEM/boot.efi

    # required files for mac efi boot
    cat > $TARGET/mach_kernel <<-EOF
    This file is required for booting
    EOF

    cat > $SYSTEM/SystemVersion.plist <<-EOF
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
            <key>ProductBuildVersion</key>
            <string></string>
            <key>ProductName</key>
            <string>Linux</string>
            <key>ProductVersion</key>
            <string>Ubuntu 12.04</string>
    </dict>
    </plist>
    EOF
f