You could have downloaded MacMerger 1.0 for Mac from our application library for free. The actual developer of this free Mac application is SubRosaSoft Inc. The following version: 1.0 was the most frequently downloaded one by the program users. The program belongs to System Tools. This free software is developed for Mac OS X 10.4.0 or later. The most frequent installer filename for the application is: macmerger.zip.
From the developer:
MacMerger is the quick and easy way to merge two folders on your Mac. Simply select the original folder and the folder you would like to merge it’s contents with and with a single click of the mouse the contents are merged together. MacMerger copies the contents of one folder to another much faster than the OS X Finder does utilizing special copying routines.
You may want to check out more Mac applications, such as Libra, Mac ScanAndSweep or DataLore, which might be similar to MacMerger.