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 To be clear, we are talking about the power chime on newer Mac devices — not the startup chime The startup chime has been removed from virtually all newer Mac devices When you plug a charging cable into a MacBook Pro or MacBook Air, it'll make an iPhonelike sound to indicate that charging has started Fan is not working properly (Noisy – fan is spinning too fast or Overheating – Spinning too slow) MagSafe Power Adapter indicator light is not working Screen brightness control is not working Resetting the SMC Step 01 Shut down your MacBook Step 02 Connect the MagSafe power adapter into your MacBook If it's already connected The 60W MagSafe power adapter with "L" style connector is compatible with MacBook Pro (13in, Mid 12) MacBook Pro (13in, Late 11) MacBook Pro (13in, Early 11) MacBook Pro (13in, Mid 10 Guide Diagnose A Mac Fault Macbook pro power cord not working