Download of AIFFfromPCM 1.1 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program is included in Audio & Video Tools. The bundle id for this app is com.fittingbite.aifffrompcm.
AIFFfromPCM works fine with Mac OS X 10.6.6 or later. We recommend checking the downloaded files with any free antivirus. The most popular version among AIFFfromPCM for Mac users is 1.1. This Mac application was originally developed by Severin Kurpiers.
From the developer:
AIFF from PCM is a tool to convert files containing stereo or mono linear PCM sound data into AIFF format.
You can often get a file containing linear PCM sound data as a result of demuxing (extracting) individual streams from a DVD disk.
To help visualize here is an example: You authored a DVD disk using iDVD a long time ago. The burned disk is still there but your original soundtrack is no more available.
You may want to check out more Mac applications, such as AIFF from PCM, which might be related to AIFFfromPCM.