A long time ago, the Hacha program to join and divide files became very popular in WindowsThere was also the MacHacha some time later, although it was not at all a program in line with the aesthetics of our Mac.
Data Glue has a simple but very native interface that goes great with our Mac, it is built entirely for Mac OS X -which gives it more speed and fewer errors- and it is very light, using little memory.
It's available on the Mac App Store for zero euros, great price.
Source | AddictiveTips
Mac App Store | DataGlue