How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?

Question

I\'m using the PostgreSQL database for my Ruby on Rails application (on Mac OS X 10.9).

Are there any detailed instructions on how to upgrade PostgreSQL database?

Answer 1

On Windows I kept facing different errors messages when trying to use pg_upgrade.

Saved a lot of time for me to just:

1. Backup DB
2. Uninstall all copies of PostgreSQL
3. Install 9.5
4. Restore DB