使用grub2同时引导mac、windows、ubuntu三个系统

视频教程：https://www.bilibili.com/video/bv1uD4y1R7Wd

grub添加项目：

 menuentry 'Mac OS Catalina (on /dev/sda1)' --class osx --class darwin --class os $menuentry_id_option 'osprober-xnu-64-67E3-17ED'  {
        insmod part_gpt
        insmod fat
        set root='hd0,gpt1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1  67E3-17ED
        else
          search --no-floppy --fs-uuid --set=root 67E3-17ED
        fi
        chainloader /EFI/OC/OpenCore.efi
}