Resposta para "MacBook turns off when charger is disconnected"Same problem, but the three chimes didn't work for me. The battery stays charged and symbol at top shows 100%, but computer is still saying the battery needs replacing, rates it as poor. Shuts down as soon as power cord removed. Coconut says it's 99.4% with 1 cycle. Any suggestions appreciated. Battery warning "Replace Now" did not show up, info looked normal. All seemed well until I took off the MagSafe. Computer went off and when back on the warning showed up again.