Causes of shutdown on OS X with explanations for what they mean and how to fix them.

• 5
  Correct Shut Down.
  Shutdown was initiated, from the OS X Shut Down menu or other shutdown command.

• 3
  Hard shutdown.
  Check power button.

• 0
  Power disconnected.
  Check power supply/battery.

• -3
  Multiple temperature sensors exceeded the defined limit.
  Run Apple Service Diagnostics to check which sensor went beyond expected thermal limits.

• -60
  Bad master directory block (badMDBErr).
  Back up your data, erase the disk and reinstall OS X.

• -61
  Watchdog timer detected unresponsive application, shutting down the system.
  Troubleshoot for stuck application, startup item and any loading preferences.

• -62
  Watchdog timer detected unresponsive application, restarting the system.
  Troubleshoot for stuck application, startup item and any loading preferences.

• -71
  SO-DIMM Memory temperature exceeds limits.
  Swap memory module and check with known-good one to confirm issue is with memory; also check fans and air flow.

• -74
  Battery temperature exceeds limits.
  Swap battery and check with known-good one to confirm issue is with customer battery.

• -75
  Communication issue with AC adapter.
  Check MagSafe connector/adapter plug/cable.

• -78
  Incorrect current value coming from AC adapter.
  Check AC adapter plug/cable.

• -79
  Incorrect current value coming from battery.
  Check battery and battery connection to logic board.

• -86
  Proximity temperature exceeds limits.
  Check thermal contact with heatsink, fan connection/activity.

• -95
  Temperature temperature exceeds limits.
  Check thermal contact with heatsink, fan connection/activity.

• -100
  Power supply temperature exceeds limits.
  Check fans and air flow.

• -103
  Battery cell under voltage detected.
  Check battery.

• -104
  unknown
  Check battery.

• -127
  PMU forced shutdown.
  Check power switch.

-128

unknown

May be related to RAM.