AudioDenoise 1.1.4 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application is categorized as Audio & Video Tools. We recommend checking the downloaded files with any free antivirus. This Mac app is a product of CrumplePop.
From the developer:
AudioDenoise by CrumplePop is a plug-in that automatically removes hiss and background noise from your audio – right inside Final Cut Pro X and Premiere Pro. If your video has noisy audio, it makes your project look bad. A hiss in the background is distracting and it instantly makes your video look amateurish. AudioDenoise™ by CrumplePop actually removes this noise from your audio, leaving you with a clean, polished sound.
You may want to check out more software for Mac, such as AudioDenoise 2, which might be related to AudioDenoise.