Download of Beatrix 3.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application relates to Audio & Video Tools. The actual developer of this Mac application is ssdware. 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.
From the developer:
Beatrix is a lightweight OS X app that enables you to make quick and simple beats on your Mac. You can create a beat by using your keyboard to tap it out and can use any of 61 instruments, and then save your beat for re-use. It works on Mac computers.
You may want to check out more software for Mac, such as Drum Keys, which might be similar to Beatrix.