macOS Error -100 — 4 Ways to Fix App Not Responding
📑 In This Guide
Is your macOS MacBook Air showing error -100? You are not alone. The error code -100 indicates app not responding, and it affects thousands of macOS users worldwide. The good news is that this error is usually fixable at home without calling a technician.
In this comprehensive guide, we will walk you through 4 proven methods to fix macOS error -100. We have organized these fixes from the simplest to the most advanced, so you can start with the easiest solution first. Most users can resolve this error in under 14 minutes.
What Is macOS Error -100?
Error -100 is a common macOS system error that indicates app not responding. This error can appear on your system's control panel display or as a pop-up message on your computer screen.
When error -100 occurs, your system may stop working, flash warning lights, or display the error code. The root cause is typically related to failing hard drive. Understanding what triggers this error is the first step toward fixing it.
Error -100 can affect various macOS MacBook Air models, both older and newer versions. If you are experiencing this error, do not worry — we have compiled all the necessary troubleshooting steps below to help you get your system back to正常工作.
Common Causes of -100
This error can be triggered by several factors. Understanding the root cause helps you choose the right fix.
- Failing hard drive.
- Permission corruption.
System Models Affected by -100
-100 has been reported on the following macOS system models:
| Device Series | Models | Common? | Easy Fix? |
|---|---|---|---|
| MacBook Air | All MacBook Air | ✅ Yes | ✅ Yes |
Error -100 on MacBook Air running macOS Sequoia.
4 Proven Ways to Fix -100
Try these methods in order. Start with the easiest and most common solutions first.
Method 1: Restart Mac
Easy ⏱ 2 min-
1. Apple menu > Restart.
2. Wait for reboot.
3. Check error.
Method 2: Reset NVRAM
Easy ⏱ 3 min-
1. Shut down.
2. Press Option+Cmd+P+R on boot.
3. Hold 20 sec.
4. Release.
Method 3: Reset SMC
Medium ⏱ 5 min-
1. Shut down.
2. Hold Shift+Ctrl+Option+Power 10s.
3. Release.
4. Power on.
Method 4: Run Disk Utility
Medium ⏱ 10 min-
1. Open Disk Utility.
2. Select startup disk.
3. Run First Aid.
4. Restart.
If you have tried all methods above and error -100 persists, contact macOS support. They can run advanced diagnostics and arrange a repair if needed.
Frequently Asked Questions (FAQs)
Error -100 on macOS systems indicates app not responding. This means the system has detected an issue that prevents normal operation.
Follow the step-by-step methods in this guide. Start with a power cycle, then check the app not responding, and proceed with the remaining fixes in order.
Yes, most macOS error -100 cases can be resolved at home using the methods in this guide. Professional help is rarely needed.
If the fix is software or connection related, it is free. If a replacement part is needed, costs vary from $15 for cartridges to $150 for hardware repairs.
Hardware defects causing error -100 are typically covered under macOS's standard warranty. Consumables like ink and toner are not covered.
Conclusion
macOS error -100 can be frustrating, but as you have seen, there are 4 effective ways to resolve it. In most cases, starting with a simple power cycle or checking your cartridges will solve the problem quickly.
If you have tried all the methods above and the error -100 persists, it may be time to contact macOS support for professional assistance. Remember to keep your system's firmware updated and use genuine supplies to prevent future errors.
Error -100 on macOS systems is usually fixable at home. Begin with the easiest fix and work your way up.