What to Do When Your Mac Won't Turn On

Checking the Power Source and Accessories

When your Mac won’t turn on, the first step is to check the power source and accessories. Sometimes the issue is as simple as a loose power cable or a drained battery. Here are a few things you can try:

Check the power cable: Ensure that the power cable is securely connected to both your Mac and the power outlet. If the cable is frayed or damaged, try using a different cable.
Verify the power outlet: Make sure the power outlet is functioning properly by plugging in another device or using a different outlet.
Inspect the power adapter: Examine the power adapter for any signs of damage or overheating. If it appears damaged, you may need to replace it.
Test a different power source: If you’re using a power strip or surge protector, try connecting your Mac directly to a wall outlet to rule out any issues with the power source.
Remove any accessories: Disconnect any peripherals or accessories, such as printers or external hard drives, from your Mac. Faulty accessories can sometimes prevent your Mac from turning on.

If after checking the power source and accessories your Mac still won’t turn on, it’s time to move on to the next troubleshooting step.

Resetting the SMC (System Management Controller)

If your Mac is still unresponsive after checking the power source and accessories, the next troubleshooting step is to reset the SMC. The System Management Controller is responsible for managing various hardware functions on your Mac, and resetting it can often resolve power-related issues. Here’s how you can do it:

Shut down your Mac: Click on the Apple menu in the top left corner of the screen, and select “Shut Down”.
Disconnect the power cable: Unplug the power cable from your Mac and wait for 15 seconds.
Reset the SMC: Depending on your Mac model, follow the appropriate steps below:
- MacBook with a non-removable battery: Press and hold the Shift + Control + Option keys on the left side of the keyboard together with the power button, and then release all the keys and power button simultaneously.
- MacBook with a removable battery: Disconnect the power cable, remove the battery, press and hold the power button for 5 seconds, reinsert the battery, and then reconnect the power cable.
- Desktop Mac: Disconnect the power cable, wait for 15 seconds, and then plug in the power cable again.
Turn on your Mac: Press the power button to turn on your Mac. If it starts up successfully, the SMC reset was successful.

If resetting the SMC doesn’t resolve the issue, it’s time to move on to the next troubleshooting step.

Verifying the Display

If your Mac appears to be powered on but you can’t see anything on the screen, it’s important to verify if the display is the issue. Here are some steps you can take to troubleshoot the display:

Check the brightness level: Use the brightness keys or settings on your keyboard to adjust the brightness of the screen. Sometimes the brightness might be set too low, making it difficult to see anything.
Connect to an external display: If you have access to an external monitor or TV, connect your Mac to it using the appropriate cables. This will help determine if the issue lies with the Mac’s built-in display or if it’s a graphics card problem.
Restart in Safe Mode: Restart your Mac and hold down the Shift key as it boots up. This will start your Mac in Safe Mode with minimal software and drivers, which can help identify if third-party software is causing display issues.
Inspect for physical damage: Check the display for any physical damage, such as cracks or breaks. If you notice any damage, it may require professional repair.
Try a different display cable: If you are using an external monitor or TV, try using a different cable to connect it to your Mac. Sometimes a faulty or loose cable can cause display problems.

If after verifying the display, you still encounter issues, it’s time to move on to the next troubleshooting step.

Booting in Safe Mode

If your Mac is encountering software-related issues, booting in Safe Mode can help identify and resolve the problem. Safe Mode is a diagnostic startup mode that only loads essential system software and disables unnecessary extensions or third-party software. Here’s how to boot your Mac in Safe Mode:

Shut down your Mac: Click on the Apple menu in the top left corner of the screen, and select “Shut Down”.
Press the power button to turn on your Mac: As soon as you hear the startup chime, press and hold the Shift key.
Release the Shift key: After some time, you will see the Apple logo and a progress bar. Once you reach the login screen, you can release the Shift key.
Login to your Mac: In Safe Mode, you’ll notice that the desktop looks slightly different and some features may be limited. Login with your credentials and test the performance of your Mac.
Check for issues: While in Safe Mode, observe if you are still experiencing the same problems that prevented your Mac from turning on normally. If the issues seem to be resolved, it may indicate that a third-party software or extension is causing the problem.
Restart your Mac: After you have completed your troubleshooting in Safe Mode, restart your Mac to exit Safe Mode and resume normal operation.

If booting in Safe Mode doesn’t fix the problem, proceed to the next troubleshooting step.

Running Apple Diagnostics

If you suspect that there could be a hardware issue causing your Mac to not turn on, running Apple Diagnostics can help you identify any potential problems. Apple Diagnostics is a built-in hardware diagnostic tool that can test and diagnose various components of your Mac. Follow these steps to run Apple Diagnostics:

Disconnect any peripherals: Remove any external devices, such as printers or external hard drives, from your Mac.
Shut down your Mac: Click on the Apple menu in the top left corner of the screen, and select “Shut Down”.
Press the power button to turn on your Mac: As soon as you hear the startup chime, press and hold the Option (⌥) + D keys on your keyboard.
Select a network connection: If a network connection is required, select a Wi-Fi network and enter the password if prompted.
Run the diagnostics: Follow the on-screen instructions to start running Apple Diagnostics. The process may take several minutes, as it thoroughly tests the hardware components.
Review the diagnostic results: Once the diagnostics are complete, you will see a summary of the results. If any issues are detected, Apple Diagnostics will provide suggestions for further troubleshooting or recommend contacting Apple Support.

Running Apple Diagnostics can help you pinpoint any potential hardware problems. If the diagnostics indicate a hardware issue, it’s recommended to contact Apple Support or visit an authorized service provider for further assistance.

Disconnecting External Devices

If your Mac is still not turning on, it’s worth checking if any external devices are causing the issue. Sometimes, a faulty or incompatible device can prevent your Mac from powering on. Here’s what you can do:

Disconnect all peripherals: Unplug all external devices connected to your Mac, such as printers, keyboards, mice, USB devices, and monitors.
Remove USB hubs or docking stations: If you are using a USB hub or docking station, disconnect your Mac from it and try powering it on again.
Check for compatibility: If you recently connected a new device, ensure it is compatible with your Mac model. Check the manufacturer’s website or documentation for compatibility information.
Inspect cables and connectors: Examine the cables and connectors for any damage or signs of wear. Faulty cables or connectors can cause power issues. Replace any damaged cables as necessary.
Attempt to power on your Mac: Once all external devices have been disconnected, press the power button to turn on your Mac.

If your Mac successfully powers on without any external devices connected, one of the peripherals may have been causing the problem. Connect them back one by one and test your Mac’s functionality after each connection to identify the problematic device. If you find that a particular device is causing the issue, it may require troubleshooting or replacement.

If your Mac still won’t turn on even after disconnecting all external devices, it’s time to explore further troubleshooting options.

Cleaning the Power Button

If your Mac’s power button is unresponsive or gets stuck, it could prevent your Mac from turning on. Cleaning the power button can help restore its functionality. Here’s how you can clean the power button:

Shut down your Mac: Click on the Apple menu in the top left corner of the screen, and select “Shut Down”.
Disconnect the power cable: Unplug the power cable from your Mac.
Gently press the power button: Use your finger to press the power button down and release it several times. This helps loosen any debris that may be causing the button to stick.
Use compressed air: If there is visible dirt or dust around the power button, use compressed air to blow away the debris. Hold the canister a few inches away from the button and give it short bursts of air.
Wipe the power button: Dampen a lint-free cloth or cotton swab with isopropyl alcohol. Gently clean around the power button, removing any remaining dirt or residue.
Let it dry: Allow the area to dry completely before reconnecting the power cable and turning on your Mac.

After cleaning the power button, connect the power cable and attempt to turn on your Mac. If the power button now functions properly, your Mac should power on successfully. However, if the issue persists, it’s recommended to move on to the next troubleshooting step.

Trying a Different Power Adapter

One possible reason why your Mac won’t turn on is a faulty power adapter. To rule out any issues with the current power adapter, trying a different one can help determine if that’s the problem. Here’s what you can do:

Find another compatible power adapter: If you have access to another power adapter that is compatible with your Mac model, borrow it from a friend or family member.
Connect the new power adapter: Disconnect the current power adapter from your Mac and connect the new one securely.
Plug the power adapter into a power outlet: Ensure that the power outlet is functioning properly and plug the power adapter into it.
Attempt to power on your Mac: Press the power button to turn on your Mac with the new power adapter connected.

If your Mac powers on successfully with the new power adapter, it indicates that the previous power adapter may be faulty. You should consider replacing it to ensure stable power supply to your Mac.

However, if your Mac still doesn’t turn on even with the different power adapter, there might be an issue beyond the power supply. Proceed to the next troubleshooting step for further investigation.

Replacing the Battery

If your Mac laptop is not turning on and you have ruled out other potential causes, such as a faulty power adapter or software issues, the problem could be a worn-out or defective battery. Here’s what you need to know about replacing the battery:

Note: This section applies specifically to Mac laptops with user-replaceable batteries. If you have a MacBook model with a non-removable battery, it is recommended to reach out to an authorized service provider for assistance.

Shut down your Mac: Click on the Apple menu in the top left corner of the screen, and select “Shut Down”.
Disconnect the power adapter: Unplug the power adapter from your Mac and ensure it is completely disconnected.
Remove the battery: Locate the battery latch or release button at the bottom of your Mac laptop. Slide or press the latch/button to release the battery and gently remove it from the device.
Obtain a compatible replacement battery: Contact an authorized Apple reseller or visit the Apple website to purchase a genuine battery specifically designed for your Mac model.
Install the new battery: Carefully align the new battery with the battery compartment and insert it. Make sure it is securely seated and the latch or lock mechanism properly engages.
Connect the power adapter: Plug the power adapter back into your Mac and connect it to a power source.
Power on your Mac: Press the power button to turn on your Mac. If the new battery is installed correctly, your Mac should now start up normally.

If your Mac laptop continues to experience issues even after replacing the battery, it is recommended to seek professional assistance from an authorized service provider or contact Apple Support for further guidance.

Getting Professional Help

If you have tried all the troubleshooting steps mentioned above and your Mac still won’t turn on, it may be time to seek professional help. Here are some options to consider:

Contact Apple Support: Reach out to Apple Support either by phone or through their online support portal. They can provide guidance and assistance tailored to your specific situation.
Visit an Apple Authorized Service Provider: Find a certified Apple service provider near you and schedule an appointment to have your Mac diagnosed and repaired by trained professionals.
Visit an Apple Retail Store: If there is an Apple Retail Store in your area, you can schedule a Genius Bar appointment for in-person support. Apple experts can assess the issue and suggest appropriate solutions.
Seek assistance from a reputable repair specialist: If there are no Apple Authorized Service Providers or Retail Stores nearby, you can consider consulting a reputable third-party repair specialist. Ensure they have experience working with Mac computers and use genuine parts.

When seeking professional help, it’s important to provide them with as much information as possible about the issue and the troubleshooting steps you have already taken. This will help them diagnose the problem more efficiently.

Remember that professional assistance comes with a cost, especially if your Mac is out of warranty. Be prepared to discuss potential service costs and any warranty coverage that may still apply.

Overall, seeking professional help ensures that your Mac receives proper diagnosis and repair by knowledgeable experts, increasing the chances of resolving the issue and getting your Mac back in working condition.