终端输入一下的命令，将文件下载下来
wget --header="Cookie:MySQL_S=u1ddsnr95sraoqjcu4og46ojrcapim37; MyGUID=59f3a59dc7ffbe8faae86824eda378d85b1cb02513631397%21; s_cc=true; s_nr=1528607092149; gpName=mysql%3Adev%3A/downloads/file/; gpChannel=mysql%3Adownloads%3Afile; gpServer=dev.mysql.com; s_sq=%5B%5BB%5D%5D" https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.11-macos10.13-x86_64.dmg
然后按步骤一步一步的装：
注意：8.0设置密码的时候需要主要
选择下面这个