Downloading Tux Guitar 1.5.6 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 actual developer of this free software for Mac is akdmia. 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. The software lies within Audio & Video Tools, more precisely Editors & Converters.
From the developer:
TuxGuitar is a multitrack guitar tablature editor and player written in Java-SWT, It can open GuitarPro, PowerTab and TablEdit files. Users are allowed to download tablature files from the other websites to play them in the application. The database is also quite big with tablatures.
You may want to check out more Mac applications, such as Tux Paint, Matt Warnock 101 Jazz Guitar Licks or MIDI Guitar For Garageband, which might be similar to Tux Guitar.