The 485.0 version of Hue Sync for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software lies within System Tools, more precisely Device Assistants. The actual developer of this free software for Mac is Signify Holding. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Hue Sync is an application that captures the content you’re watching, listening to, or playing. Then, it translates the content into an immediate lightscript for an immersive experience. Via screen grabbing and a smart color algorithm, it matches your Philips Hue lights to on-screen action in real-time. In addition, it listens to the beat and the type of your song, creating a lightscript that match the music you are listening to.
You may want to check out more software for Mac, such as Sync Spanning Tools for Mac, Circadian Hue or Hues, which might be related to Hue Sync.