Never saw that icon before either on a PC only software (when both names shown, it is dual platform).
Please provide an example of this showing same icon on a non-Mac software that has that.
Does not have to be hard.
I know one game that used OpenAL for Mac port, and DX for WIndows.
1. The Mac platform has very few Flight sim style games, so they have a potentially huge unexploited market.
2. Apple uses ATI or Nvidea chips in all its computers except the lowest end MacBook and MacBook Air. Even last 2 years of the tiny MacMini is using an Nvidia GeForce 9400M with 256 MiB of DDR3 SDRAM or currently NVIDIA GeForce 320M with 256MiB of DDR3 SDRAM
3. Mac's have been steadily gaining market-share and forecasts show sustained growth.
4. Historically it is much easier to support Apple computers then Windows because very well documented hardware/software (many companies have dozens of Windows support people, but only 1 or 2 for Mac).
5. iPhone/iPod/iPad success.
6. Windows is sooooooo 2000.
At the very least UBI is being smart by supporting a resurgent platform, and at best they could potential see large revenues from that market.
EDIT: Download is PC, found that on UBI site.