BeeCells is a cute little game from BUTANT. The goal is to arrange six or more balls of the same color together in a group. After balls are arranged they disappear. After each turn computer does put more balls on the board and your task becomes more difficult.
To run this game you need:
2. Mac OS 10.2.
3. Some RAM.
4. About 2Mb of disk space.
More info and download link here.