There are many alternatives to HJSplit for Mac and since it's discontinued a lot of people are looking for a replacement. The best Mac alternative is Split&Concat, which is free. If that doesn't suit you, our users have ranked more than 10 alternatives to HJSplit and four of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to HJSplit are Data Glue (Paid), ChunkJoiner (Free) and EasySplitMarge (Paid).
ChunkJoiner lets you join (physically concatenate) a group of documents into a single piece. To use it, simply select the documents you want to join, and drag&drop the entire group on top of the ChunkJoiner icon.
EasySplitMarge is a fast app to split or join files. Split and merge back your files on Mac OS X.EasySplitMarge is capable to cut size of any file format like image, audio, video, zip, exe, rar, txt, doc etc into small parts.