How To Tell If Macbook Battery Is Bad. In the system information window expand the Hardware category on the left and then select the Power option. A MacBook can also turn itself off if it overheats or encounters certain errors.

The condition rating can be Normal Replace Soon Replace Now or Service Battery. The battery health on MacBook is determined by your MacBook itself and will let you know if something goes wrong. Reset your battery.
If the light is orange youre charging.
The battery is completely dead. The battery is functioning normally. A MacBook is an exceptional device and also more expensive so does the cost of its battery. The Cycle Count entry is under the Health Information section.
