Mac is a sore loser

I'm learning how to play chess. Apparently there is some bug with Mac chess, where it can't make up it's mind on what good piece to loose. Attached are three saved games with me (white) poised to take at least on of the computer's (black) key pieces. It's the computer's turn, and you can see that nothing is happening. I'm not that good, but I have to say it's an annoyance to have the computer cornered only to have the computer say "I hate this game, I hate this world, and I hate you!". I'm sure if the wimp could actually flip the board over and run off... it would. pshha.