As of 13 August 2026, AI can only partly fix your Mac that will not start.

What to actually do

1. Hand it to a person

   The route this page recommends

   A person who owns the outcome does this end to end, worth it when the failure is dear.

2. Use a tool built for this

   Second choice

3. Do it yourself

   The distant third

   A chat interface, no skill needed, and roughly 30 minutes until you can act on the result.

   How to actually do it

   1. Open a chatbot and paste the prompt, filling in the bracketed details with exactly what you observe, including whether the screen shows an Apple logo, a question mark or nothing.
   2. Follow only the next safe check it gives you, beginning with the power connection, charger, accessories and forced shutdown instructions that match your Mac.
   3. Paste the exact result of that check back into the chat, including any change in sounds, lights, screen messages or progress bar.
   4. Continue through the non-destructive checks for your Mac type, and ask the chatbot to stop before any erase, macOS reinstall or Terminal command.
   5. If the Mac reaches macOS, open your important files and create or confirm a backup before doing anything further.
   6. If it remains unresponsive, shows liquid or physical damage, or the next step risks data loss, contact Apple Support or a reputable UK repair service and describe the checks and symptoms you recorded.

   Prompt

   Act as a cautious Mac troubleshooting guide. Help me diagnose a Mac that will not start, but do not claim to have repaired it or diagnose hardware remotely.
   
   My details:
   - Mac model or approximate year: [model or unknown]
   - Apple silicon or Intel: [known or unknown]
   - What happens when I press the power button: [describe exactly]
   - Screen behaviour: [black, Apple logo, progress bar, question mark, recovery screen, or other]
   - Sounds or lights: [describe]
   - Charger and power details: [describe]
   - What changed recently: [update, drop, liquid, new accessory, or nothing known]
   - Whether the files are backed up: [yes, no, or unknown]
   
   Give me one step at a time, starting with safe, non-destructive checks. For each step, tell me exactly what to do and what result to report back. Separate instructions for Apple silicon and Intel Macs when they differ. Do not tell me to erase the Mac, reinstall macOS, or use Terminal commands unless you first explain the data-loss risk and confirm that safer options have been exhausted. Stop and tell me to contact Apple Support or a reputable repair service if there are signs of liquid damage, burning, swelling, repeated clicking, no power after basic checks, or a likely hardware fault. Never ask me to share passwords, recovery keys or private files.

   Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.