Download of XCSoar 7.23 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app was originally developed by XCSoar. XCSoar for Mac relates to Lifestyle Tools. 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.
From the developer:
XCSoar is a tactical glide computer that provides you with everything you need as a glider pilot. The terrain and topology data from all over the world can be displayed on the moving map. All received FLARM traffic is displayed on the map and on the inset radar screen. A butterfly-like radar can be opened including climb values and touch-to-select functionality.
You may want to check out more software for Mac, such as SerieFoot, Mini Ramp or AXAnalyst, which might be related to XCSoar.