to play this game on a Mac:
1. Download the game
2. Open the Terminal app
3. Type 'sudo chmod -R +x '
4. Drag and drop the Sinisistar after the '+x ' part. It should look like this: sudo chmod -R +x /Users/[...]/Sin_v3.0.0/SiNiSistar/mac/SiNiSistar.app (ie, there must be a space between '+x' and the location of the app)
5. Hit enter
6. Type the password of your computer and hit enter
7. Congratulations, the Mac app can now be opened
However, after opening the game, it's just a black screen for me. Clicking anywhere produces a bell-like sound, after which the game crashes, so idk what to do afterwards