brew install redis

==> Pouring redis--6.2.5.catalina.bottle.tar.gz
==> Caveats
To start redis:
  brew services start redis
Or, if you don't want/need a background service you can just run:
  /usr/local/opt/redis/bin/redis-server /usr/local/etc/redis.conf
==> Summary
🍺  /usr/local/Cellar/redis/6.2.5: 14 files, 2.0MB
Removing: /usr/local/Cellar/redis/6.2.4... (14 files, 2.0MB)
Removing: /Users/wuxiao/Library/Caches/Homebrew/redis--6.2.4... (879.3KB)

//方式一：使用brew帮助我们启动软件
brew services start redis
//方式二
redis-server /usr/local/etc/redis.conf