Downloading Split&Concat 3.0 for Mac from the developer's website was possible 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 File Compression.
The program can also be called "SplitConcat", "split concat", "Split Concat SNOW". This free software for Mac OS X was originally produced by Loek Jehee.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The most frequent installer filename for the program is: splitandconcat_3.0.dmg.zip. The most popular versions of the application are 3.0 and 2.5.
From the developer:
In Internet newsgroups large files often are split into smaller parts since messages can not be of more than a certain size to be able to post them in newsgroups.
For that reason you can find often binary files that are split in parts like filename.mp3.001, filename.mp3.002, filename.mp3.003 etcetera. It is possible to put these parts together using commands in the Terminal yet not everybody is handy with that.
You may want to check out more software for Mac, such as Archiver - Compress files and folders & extract archives, ALZip or The Archive Browser, which might be similar to Split&Concat.