有人说重置SMC可以解决这个问题，然而我没有试。最后看LOG，居然一堆连网错误，难道要校验checksum？
再到苹果官网上看到这个：
https://discussions.apple.com/message/33927150#33927150
- Hi,
-
- Had the same problem, but for me it worked by
-
- removing all DNS search domains
- untick the automatic proxy configuration
-
-
- for the Wifi adapter.
-
- good luck.
果然尝试。果然有效（最终发现还是有问题，终于。。重置NVRAM，安装完成）
网址：https://appletoolbox.com/2017/12/macos-could-not-be-installed-how-to-fix/
- 节选
- Next, let’s try out the basic NVRAM reset (or PRAM for older Macs) on your computer.
- Follow these steps if you are not sure about how to do the NVRAM reset
- Shut down your Mac
- Turn it on and immediately press and hold these four keys together: Option, Command, P, and R macOS Could Not Be Installed, How-To Fix
- Release the keys after about 20 seconds, during which your Mac might appear to restart
- Open System Preferences and check (and adjust, if necessary) any settings that reset, like volume, display resolution, startup disk selection, or time zone
- 说白了，就是启动的时候 cmd+option+P+R，等20秒。放开，再重启
一切都清静 了。只是感觉这一版，没什么变动的
linux上面，如果替换文件中的内容，其实还是比较方便的。比如：sed -i 's/xxx/yyy/g' xxx.txt
然而同样的命令，如果放到mac下面，就会报：sed: 1: "xxx.txt": invalid command code o
到stackoverflow.com就会发现已经有人回复了：https://stackoverflow.com/questions/19456518/invalid-command-code-despite-escaping-periods-using-sed
XML/HTML代码
- If you are on a OS X, this probably has nothing to do with the sed command. On the OSX version of sed, the -i option expects an extension argument so your command is actually parsed as the extension argument and the file path is interpreted as the command code.
-
- Try adding the -e argument explicitly and giving '' as argument to -i:
-
- find ./ -type f -exec sed -i '' -e "s/192.168.20.1/new.domain.com/" {} \;
- See this.
所以上面的代码就改为：sed -i '' -e 's/xxx/yyy/g' xxx.txt ，搞定
参考：
1、https://stackoverflow.com/questions/19456518/invalid-command-code-despite-escaping-periods-using-sed
2、https://stackoverflow.com/questions/7573368/in-place-edits-with-sed-on-os-x
mac下面安装过docker，但后来删除过。然后系统又重做过。结果再次安装docker的时候报错，如题（详细 路径不贴了）
找了一下资料，各种各样的都有，最后还是选择了：
XML/HTML代码
- sudo rm -r /var/tmp/com.docker.vmnetd.socket
- sudo rm -r ~/Library/Application\ Scripts/com.docker.helper/
- sudo rm -r ~/Library/Containers/com.docker.*
- sudo rm -r ~/Library/Preferences/com.docker.docker.plist
- sudo rm -r ~/Library/Group\ Containers/group.com.docker/
然后再次运行Docker，一切都解决了
