I've been using MySQL WorkBench for so long on Mac OS X. I've been trying to save/backup all my host connections before I update MySQL WorkBench.
Is there a way to do that ?
On your Mac, find the file ~/Library/Application Support/MySQL/Workbench/connections.xml
This XML file contains all the connection info, except for plaintext passwords (those are stored in the Keychain).
Re your comment:
I don't know why you need to delete the app. Just install the latest version over the old version. That's what I do, and what I assume everyone else does too.
You would not need to back up the connections.xml file unless you want to install MySQL Workbench on a different Macbook, and bring the connections to that new installation. But you'd need to enter the passwords again anyway.