We’ve been testing Serato DJ across the beta versions of macOS Sierra and should be able to confirm support shortly after the official release.
So please hold off upgrading for now.
If you need any help or have any questions, please contact Serato Support.
macOS Sierra and Scratch Live: As Scratch Live is a legacy product, we don’t recommend updating to macOS Sierra as there may be unknown issues. If you have supported hardware for Serato DJ, we recommend upgrading - download Serato DJ.