1 从appstore下载最新的 MacOS High Sierra 下载完成后先不要安装

2 格式化U盘

格式化后 名称设为 HighSierra

3

在控制台执行 命令 

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierra --applicationpath /Applications/Install\ macOS\ High\ Sierra.app —nointeraction

执行完成后  如遇到这样的提示(If you wish to continue type (Y) then press return: Y)  再输入Y 后等待 10 到20分钟即可安装完毕

localhost:Install macOS High Sierra.app tiantao$ sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierra --applicationpath /Applications/Install\ macOS\ High\ Sierra.app —nointeraction

Ready to start.

To continue we need to erase the volume at /Volumes/HighSierra.

If you wish to continue type (Y) then press return:  sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierra --applicationpath /Applications/Install\ macOS\ High\ Sierra.app —nointeraction

Operation canceled.localhost:Install macOS High Sierra.app tiantao$  sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volum --applicationpath /Applications/Install\ macOS\ High\ Sierra.app —nointeraction

Ready to start.

To continue we need to erase the volume at /Volumes/HighSierra.

If you wish to continue type (Y) then press return: Y

Erasing Disk: 0%... 10%... 20%... 30%...100%...

Copying installer files to disk...

Copy complete.

Making disk bootable...

Copying boot files...

Copy complete.

Done.

localhost:Install macOS High Sierra.app tiantao$

4 安装完后的效果如图

系统的安装

插入U盘,  在启动的过程中 一直 点击 option 键 即可进入安装系统界面  后续工作按提示 重装系统 或者格式化 磁盘后 再重装即可.

对于10.14系统以上的安装

用上述命令会提示警告

WARNING: "--applicationpath" is deprecated in macOS 10.14 and greater. Please remove it from your invocation.

去掉--applicationpath 即可

sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierra /Applications/Install\ macOS\ Catalina.app —nointeraction