Macrotune 1.2 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free software for Mac OS X is an intellectual property of PoseMotion. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software is included in Audio & Video Tools.
From the developer:
Macrotune is a MML (Music Macro Language) editor. Features Four MML editors with syntax coloring. Each channel has its own start/default options. These settings can be altered throughout your tune with the Music Macro Language. A time signature gadget that allows you to visually see the current beats per measure in the editors while you type. A pattern editor to piece together your verses for each channel.
You may want to check out more software for Mac, such as Speak, which might be similar to Macrotune.