No specific info about version 12.1. Please visit the main page of PDF Joiner & Merger on Mac Informer.
Iovsoft MP3 Cutter Joiner is a simple audio edition tool.
Batch PDF Merger merges multiple PDF files into one large file.
Extract given page ranges as well as merge various PDF documents.
Merges several PDF documents into one single PDF file.
iStonsoft PDF Merger can merge multiple PDF documents into one for easy access.