The sequel pro favorites can be shared between Macs using cloud storage service like Dropbox, Google Drive, OneDrive, etc.
The trick is to create a file that will be synced using these cloud services and sequel pro favorites file is just a symlink to this file.
The below script is used for OneDrive but it can also work for Dropbox and other cloud storages.
- Copy the current sequel pro favorites file
cp ~/Library/Application\ Support/Sequel\ Pro/Data/Favorites.plist ~/OneDrive/SequelPro.plist