The post-install step did not complete successfully MySQL Mac OS Sierra

Question

``` [(pyEnv) Anants-MacBook-Pro:litibackend anantchandra$ brew postinstall mysql ==> Postinstalling mysql ==> /usr/local/Cellar/mysql/8.0.11/bin/mysqld --initialize-insecure --user=anantchandra --basedir=/usr/local/Cellar/mysql/8.0.11 --datadir=/usr/local/var/mysql --tmpdir=/tmp Last 15 lines from /Users/anantchandra/Library/Logs/Homebrew/mysql/post_install.01.mysqld: 2018-06-15 04:41:04 -0700 /usr/local/Cellar/mysql/8.0.11/bin/mysqld --initialize-insecure --user=anantchandra --basedir=/usr/local/Cellar/mysql/8.0.11 --datadir=/usr/local/var/mysql --tmpdir=/tmp 2018-06-15T11:41:04.901191Z 0 [System] [MY-013169] [Server] /usr/local/Cellar/mysql/8.0.11/bin/mysqld (mysqld 8.0.11) initializing of server in progress as process 37841 2018-06-15T11:41:04.903504Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting. 2018-06-15T11:41:04.903537Z 0 [ERROR] [MY-010119] [Server] Aborting 2018-06-15T11:41:04.903701Z 0 [System] [MY-010910] [Server] /u…

Accepted Answer

I was able to go back to 5.7 for anyone who wants to:

```
brew uninstall mysql
brew install mysql@5.7
brew link --force mysql@5.7
mysql.server start
mysql_secure_installation
```

After all that, I'm back in 5.7 with all my databases intact. In my case, I knew the data in the databases wasn't crucial, so I didn't attempt to backup the data in advance. Worked fine for me. If you have irreplaceable data in your local databases, you might want to tread carefully. I didn't lose data, but I don't want anyone else to lose data on my advice either. ;)

Normally, I don't mind a MySQL upgrade, but 8.0 looks to have compatibility issues I'd like to vet before going forward, and in the meantime, I'd rather be back on a version that doesn't force me to deal with those issues.

The post-install step did not complete successfully MySQL Mac OS Sierra

Solution

Problem