It says whenever I try to login, a pop-up window opens and says, "There is a bug with LJWGL that makes Minecraft incompatible with mac OS X Version 10.5.8." Minecraft is amazing and I don't want to lose it. Please Help.

It says whenever I try to login, a pop-up window opens and says, "There is a bug with LJWGL that makes Minecraft incompatible with mac OS X Version 10.5.8." Minecraft is amazing and I don't want to lose it. Please Help.