Advanced Solutions for Managing High Temperature Issues in MacBook Pro 2015 (12,1)

Guide Step by Step:

1. Understanding Normal Temperature Ranges:

   • Normal operating temperatures for MacBook Pros under load can reach up to 80-100°C, especially for models like the 2015 version. However, consistently high temperatures near 100°C are a concern.

2. Thermal Paste Application:

   • Since you’ve already changed the thermal paste, ensure it was applied correctly. Too much or too little thermal paste can affect heat dissipation.

3. Check for Dust and Debris:

   • Open the MacBook Pro and clean any dust or debris, particularly around the fans and heatsinks. Accumulated dust can impede airflow and cooling efficiency.

4. Fan Functionality Check:

   • Verify that the internal fans are working correctly. Use Macs Fan Control to monitor fan speeds. Ensure they increase as the temperature rises.
   • Consider setting a more aggressive fan control curve to increase fan speed earlier as temperatures rise.

5. Background Processes and Resource Usage:

   • Monitor your MacBook’s resource usage via Activity Monitor. High CPU or GPU usage from background processes can cause overheating.
   • Identify and close unnecessary high-resource applications.

6. Software Updates:

   • Ensure your macOS is up-to-date. Sometimes, software updates include thermal management improvements.

7. Reset SMC (System Management Controller):

   • Resetting the SMC can resolve issues related to power and thermal management. To reset:
     • Shut down your MacBook Pro.
     • Press Shift-Control-Option on the left side of the keyboard, then press the power button at the same time. Hold these keys for 10 seconds.
     • Release the keys and turn on your MacBook.

8. Use of Cooling Pads:

   • Consider using a laptop cooling pad. These can help in dissipating heat more effectively.

9. Avoiding Heat-Inducing Conditions:

   • Use your MacBook Pro on hard, flat surfaces to ensure proper ventilation.
   • Avoid using it on soft surfaces like beds or couches that can block air vents.

10. Professional Hardware Check:

    • If the issue persists, consider having a professional check the hardware, especially the cooling system and internal sensors.

11. Battery Health Check:

    • Examine the health of your MacBook’s battery. A failing battery can generate excessive heat.

12. Consider Usage Patterns:

    • Analyze your usage patterns. If your tasks are consistently high in resource demands, your MacBook Pro might be struggling to keep up, causing excessive heat.

Remember, while MacBooks are designed to handle high temperatures, consistently operating at near-maximum temperatures can shorten the lifespan of your device. If basic troubleshooting doesn't help, seeking professional assistance is advisable.