What Safe Mode Does and When to Use It
Safe Mode starts your Mac with only the essential software it needs to run—it skips third-party apps, browser extensions, login items, and some system features. This stripped-down state lets you troubleshoot problems that might be caused by something you installed or a conflict between programs.
Safe Mode is useful when your Mac runs slowly, freezes often, won't start normally, or behaves strangely. It's also the first step before you try to fix a problem yourself, because if the issue disappears in Safe Mode, you know something you added is causing it. If the problem persists in Safe Mode, it's usually a hardware issue or something deeper in the system that needs professional help.
The steps differ depending on whether your Mac has an Apple silicon chip (M1, M2, M3, or newer) or an Intel processor. Both are covered below.
Key Takeaways
- Safe Mode starts your Mac with only essential software, which helps you figure out whether a problem is caused by something you installed.
- Apple silicon Macs (M1 and newer) enter Safe Mode by holding the power button during startup, while Intel Macs use the Shift key.
- Your Mac will run noticeably slower in Safe Mode because many features are turned off—this is normal and temporary.
- If a problem goes away in Safe Mode but returns when you restart normally, something you installed is likely the cause.
- If the problem persists in Safe Mode, contact Apple Support or a technician, because it points to a hardware or system-level issue.
Safe Mode on Apple Silicon Macs (M1, M2, M3, and Newer)
Shut down your Mac completely. Press the power button and hold it down—do not let go. You will see "Loading startup options" appear on the screen after a few seconds. Keep holding until you see the startup disk options.
Click on your startup disk (usually called "Macintosh HD" or your custom name), then hold down the Shift key and click the "Continue in Safe Mode" button. Your Mac will restart and load Safe Mode, which takes longer than a normal startup. You will see "Safe Mode" in the upper right corner of the login screen.
Log in with your password. Your Mac will continue to load—this can take several minutes. Once you reach the desktop, you are in Safe Mode. Test whatever was giving you trouble. When you are done, restart your Mac normally by choosing Apple menu > Restart, and it will boot back into regular mode.
Safe Mode on Intel Macs
Shut down your Mac completely. Turn it back on and when ready hold down the Shift key. Keep holding Shift until you see the login screen appear. You will see "Safe Mode" in the upper right corner of the screen.
Log in with your password. Your Mac will finish loading—this takes longer than normal startup. Once you reach the desktop, you are in Safe Mode. Test the issue you were experiencing. When you are finished, restart your Mac normally by choosing Apple menu > Restart, and it will return to regular mode.
What to Expect While in Safe Mode
Your Mac will run noticeably slower than usual. Startup takes longer, opening apps takes longer, and overall responsiveness is reduced. This is normal—Safe Mode is deliberately limited to isolate problems, not to run at full speed.
Many features will not work: you cannot use some printers, external devices may not function, and visual effects are turned off. Some apps you installed will not appear in the Applications folder or Dock. This is temporary. Once you restart normally, everything returns.
If your Mac runs fine in Safe Mode but has problems when you restart normally, the issue is almost certainly caused by something you installed—a third-party app, browser extension, or login item. If the same problem happens in Safe Mode, it points to a hardware issue or a core system problem that needs professional diagnosis.
Troubleshooting After Safe Mode Testing
If Safe Mode revealed that something you installed is causing the problem, restart normally and uninstall the most recent app or extension you added before the trouble started. Restart again and see if the issue is gone. If it returns, uninstall the next most recent addition.
If you use browser extensions, disable them one at a time and restart between each change. Many performance and stability problems come from extensions that conflict with each other or with your browser version.
If the problem persists in Safe Mode, or if you cannot figure out which app is responsible, contact Apple Support through apple.com/support or visit an Apple Store. Bring a description of what happens and when it started—this information helps the technician narrow down whether it is a hardware failure, a corrupted system file, or something else that requires professional tools to fix.
Restarting from Safe Mode
To exit Safe Mode, choose Apple menu > Restart. Your Mac will restart and boot into regular mode automatically. You do not need to hold any keys or press any buttons—just let it restart normally.
If your Mac will not restart normally and keeps booting back into Safe Mode, shut down completely, wait 10 seconds, and turn it back on without holding any keys. If it still enters Safe Mode, this usually means a startup item or login app is forcing it back in, which is a sign to contact support.
Frequently Asked Questions
Will Safe Mode delete my files or change my settings?
No. Safe Mode only changes what loads at startup—it does not modify, delete, or move any of your files, documents, photos, or settings. Everything returns to normal when you restart.
Can I use the internet in Safe Mode?
Yes, but only if you are connected by Ethernet cable. Wi-Fi does not work in Safe Mode because the drivers are disabled. If you need internet access while troubleshooting, plug in an Ethernet cable if your Mac has one, or use a USB Ethernet adapter.
How long should I stay in Safe Mode?
Only as long as you need to test the problem. Safe Mode is a diagnostic tool, not a permanent operating state. Once you have confirmed whether the issue happens or disappears, restart normally. Staying in Safe Mode for hours or days will not fix anything.
What if my Mac will not start in Safe Mode?
If your Mac does not respond to the Safe Mode startup keys and will not boot at all, or if it crashes while loading Safe Mode, this points to a hardware problem or severe system corruption. Contact Apple Support or visit an Apple Store with your Mac.
Is Safe Mode the same as Recovery Mode?
No. Safe Mode loads your normal system with fewer features. Recovery Mode is a separate environment used to repair your disk, reinstall the operating system, or restore from a backup. Safe Mode is for troubleshooting software conflicts; Recovery Mode is for system repair.