The 1.8.2 version of 120MandolinChords for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This Mac app is a product of Neonway. The software belongs to Audio & Video Tools.
From the developer:
120MandolinChords helps you play mandolin chords right away - no experience required! This app contains over 120 chords. These are all the chords you'll need to know to be able to play all your favorite songs! Take advantage of clear, easy-to-use interface with retina support and learn the basic and advanced chord charts.
You may want to check out more software for Mac, such as FuzzMeasure, BFD2 or ARP2600 V, which might be similar to 120MandolinChords.