I personally don’t have macOS Sierra yet, but I’d recommend grabbing the 7.1 candidate as this is the latest stable version with macOS Sierra.
You can get the 7.1 candidate here: 👍🏻 RapidWeaver 7.1 Release Candidate 1 is go!
Remember this is a beta and it’s important to back up your files as 7.1 sitefiles are not backwards compatible to 7.0.4