I ran `locate blob.txt` and I got:

```
$ locate .bashrc

WARNING: The locate database (/var/db/locate.database) does not exist.
To create the database, run the following command:

  sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist

Please be aware that the database can take some time to generate; once
the database has been created, this message will no longer appear.

```

I ran this command and my locate database was built within a few minutes (includes tens of thousand of files).

On my Linux (Ubuntu) system my locatedb database is updated automatically by default, on a daily basis I believe.

How do I turn this on for my Mac?