% brew services start mariadb
Bootstrap failed: 5: Input/output error
Try re-running the command as root for richer errors.
Error: Failure while executing; /bin/launchctl bootstrap gui/501 /Users/me/Library/LaunchAgents/homebrew.mxcl.mariadb.plist
exited with 5.
I want just to start mariadb on my mac
In my case, deleting tc.log resolved the issue. You can refer to Can't start MariaDB on debian 10