Symptoms
- Apple logo appears at startup but the progress bar stalls or never appears
- Mac restarts on its own repeatedly, showing the logo each time
- Startup has been stuck for many minutes with no progress
- Problem started after a macOS update or unexpected shutdown
Likely causes
- CommonA macOS update that didn't complete properlyAn interrupted update is one of the most common causes of a boot loop.
- CommonStartup disk corruption or errorsFile system issues can prevent macOS from finishing its boot process.
- PossibleA problematic third-party login item or system extensionSome software that loads at startup can prevent the boot process from completing.
- PossibleA failing or nearly full startup driveInsufficient space or drive errors can interrupt the boot sequence.
- Less commonA hardware fault, less commonlyThis becomes more likely if Recovery Mode itself won't load either.
What to do
- Let it sit for at least 10–15 minutes, since some updates take a long time to finish even when it looks stuck.
- Force a restart by holding the power button for about 10 seconds if it's truly frozen with no progress.
- Boot into Safe Mode (hold Shift at startup on Intel Macs, or use the startup options menu on Apple silicon) to see if it loads successfully, which points to a software or login item issue.
- If Safe Mode works, remove recently added login items or third-party system extensions via System Settings.
- Boot into macOS Recovery (Command+R at startup on Intel, or hold the power button on Apple silicon until options appear) and run Disk Utility's First Aid on the startup disk.
- If First Aid finds and fixes errors, restart normally afterward.
- If the problem started right after an update, try reinstalling macOS through Recovery, which typically preserves your files.
- If the Mac won't even boot into Recovery Mode, that points to a deeper hardware issue needing professional attention.
Tools and parts
- None required
When to call a pro
If Recovery Mode won't load, or First Aid and a macOS reinstall don't resolve it, an Apple Store or authorized repair shop can perform deeper diagnostics and data recovery if needed.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.