How to Fix Flashing Question Mark Folder Issue on Mac?

Issues on macOS can range from minor glitches to problems that prevent your Mac from booting altogether. A folder with a flashing question mark is one such case that appears on the screen during startup. It usually means that either the Mac is unable to locate its startup disk or it can’t detect a working macOS installation. As a result, the system is unable to complete the boot process.

Many factors, including startup disk issues like bad sectors, formatting errors, or directory corruption, can trigger this problem. Additionally, an incompatible or incorrectly installed macOS version can also cause the Mac to fail to start. Regardless of the reason, the error can interrupt your work and prevent you from accessing your files and apps. This guide will help you quickly fix the flashing folder with a question mark issue and get your system back on track.

Quick Ways to Fix the Flashing Question Mark Issue on Your Mac

Make sure you have a backup of your Mac before proceeding. In case there’s no backup, use a Mac data recovery software to recover all your important data, as some troubleshooting methods like running Disk Utility on a damaged directory may result in data loss. Before applying more technical fixes, try some basic workarounds like restarting your Mac.  

If the error was caused by some minor software glitch, a simple restart can often resolve it. Next, check the peripheral devices like printers, scanners, or USB drives connected to your computer. Sometimes, they can interfere with the startup process and cause the flashing question mark folder issue on your Mac. Disconnect all external devices and check whether the error message disappears.

1.      Check Startup Disk Settings

Make sure you are using the correct startup disk (usually named, Macintosh HD).

• Click on the Apple menu and open System Settings.
• Go to General > Startup Disk.

• Select the startup disk that has your OS installed on it.
• Restart your Mac and see if the issue is resolved.

• Select your startup disk (Macintosh HD) from the left sidebar and click First Aid.
• Click Run and wait for the process to complete.

If the issue still persists, move on to the next method.

2.      Repair the Disk in Recovery Mode

A flashing folder with question mark issue can occur if your startup disk has run into errors or has become corrupted. Use the First Aid feature in Disk Utility to checks the drive for file-system errors. It repairs common issues like damaged directory structures, invalid volume headers, and minor metadata corruption on both APFS and HFS+ volumes. The best part is that this feature can also be accessed via Recovery Mode, useful when the Mac is unable to boot up.

Here’s how to boot into macOS Recovery:

For Apple Silicon Macs: Shut the Mac down completely. Press and hold the power button until you see “Loading startup options”. Click Options > Continue. Next, select Disk Utility and click Continue.

For Intel Macs: Restart while holding Command + R until the Apple logo appears. Your Mac will now boot into Recovery Mode. Select Disk Utility from the macOS Utilities window.

Once you have successfully accessed Disk Utility from Recovery Mode, the next step is to repair your disk using First Aid.

3.      Reset NVRAM and SMC (Intel Macs Only)

Resetting NVRAM and SMC can help fix the flashing question mark folder by clearing corrupted system parameters which control how your Mac finds and powers its hardware components while booting up. Note that this method applies only to Intel Macs and it’s not possible to manually reset NVRAM and SMC on Apple Silicon Macs.

To reset NVRAM

• Shut down your Mac.
• Press the power button and immediately press and hold the following keys: Option + Command + P + R
• Hold the keys for about 20 seconds and then release.
• Reconnect the drive after macOS has fully loaded.

To Reset the SMC (Intel laptops...

How to Fix Flashing Question Mark Folder Issue on Mac?

If the flashing question mark folder continues to appear even after trying all the troubleshooting methods above, the issue may be related to a hardware failure. In such cases, it’s best to seek professional help rather than trying to attempt further repairs yourself. You can contact Apple Support or visit and Apple authorized service provider to get your Mac properly diagnosed and repaired.1.      Repair the Disk in Recovery Mode

Make sure you have a backup of your Mac before proceeding. In case there’s no backup, use a Mac data recovery software to recover all your important data, as some troubleshooting methods like running Disk Utility on a damaged directory may result in data loss. Before applying more technical fixes, try some basic workarounds like restarting your Mac.  
If the error was caused by some minor software glitch, a simple restart can often resolve it. Next, check the peripheral devices like printers, scanners, or USB drives connected to your computer. Sometimes, they can interfere with the startup process and cause the flashing question mark folder issue on your Mac. Disconnect all external devices and check whether the error message disappears.

Issues on macOS can range from minor glitches to problems that prevent your Mac from booting altogether. A folder with a flashing question mark is one such case that appears on the screen during startup. It usually means that either the Mac is unable to locate its startup disk or it can’t detect a working macOS installation. As a result, the system is unable to complete the boot process.

Many factors, including startup disk issues like bad sectors, formatting errors, or directory corruption, can trigger this problem. Additionally, an incompatible or incorrectly installed macOS version can also cause the Mac to fail to start. Regardless of the reason, the error can interrupt your work and prevent you from accessing your files and apps. This guide will help you quickly fix the flashing folder with a question mark issue and get your system back on track.

Quick Ways to Fix the Flashing Question Mark Issue on Your Mac

Make sure you have a backup of your Mac before proceeding. In case there’s no backup, use a Mac data recovery software to recover all your important data, as some troubleshooting methods like running Disk Utility on a damaged directory may result in data loss. Before applying more technical fixes, try some basic workarounds like restarting your Mac.  

If the error was caused by some minor software glitch, a simple restart can often resolve it. Next, check the peripheral devices like printers, scanners, or USB drives connected to your computer. Sometimes, they can interfere with the startup process and cause the flashing question mark folder issue on your Mac. Disconnect all external devices and check whether the error message disappears.

1.      Check Startup Disk Settings

Make sure you are using the correct startup disk (usually named, Macintosh HD).

• Click on the Apple menu and open System Settings.
• Go to General > Startup Disk.

• Select the startup disk that has your OS installed on it.

• Restart your Mac and see if the issue is resolved.

If the issue still persists, move on to the next method.

2.      Repair the Disk in Recovery Mode

A flashing folder with question mark issue can occur if your startup disk has run into errors or has become corrupted. Use the First Aid feature in Disk Utility to checks the drive for file-system errors. It repairs common issues like damaged directory structures, invalid volume headers, and minor metadata corruption on both APFS and HFS+ volumes. The best part is that this feature can also be accessed via Recovery Mode, useful when the Mac is unable to boot up.

Here’s how to boot into macOS Recovery:

For Apple Silicon Macs: Shut the Mac down completely. Press and hold the power button until you see “Loading startup options”....

5 Best NAS Data Recovery Software in 2026, I Tested Them All Across Real Failure Scenarios

Synology dead. QNAP volume corrupt. RAID degraded. I ran five tools through every scenario that actually matters. Here's exactly what happened.

Quick Answer: The best NAS data recovery software in 2026 is Stellar Data Recovery Technician, and it's not particularly close. It's the only tool on this list that handles both online (network-connected) and offline (drives-removed) NAS recovery while simultaneously supporting RAID reconstruction, BTRFS, EXT4, Time Machine, and virtual machine disk recovery, all in a single application that runs natively on both Windows and Mac.

If you want the full breakdown of how each tool performed and which one is actually worth your money based on your specific situation, keep reading.

Why Most NAS Recovery Articles Get This Wrong

Most "best NAS data recovery software" lists are written by people who've never pulled drives from a dead Synology at midnight. They compare feature bullet points from vendor websites, rank tools that have the most checkboxes, and treat "supports NAS" as a meaningful specification without asking what that actually means in practice.

Here's what I did differently. I spent three weeks running five tools across four real NAS failure scenarios: an accidentally deleted share folder on a live Synology NAS, a QNAP unit that wouldn't boot after a firmware update, a four-drive RAID 5 array with two failed disks, and an EXT4 drive with a corrupted partition table connected directly to a Mac. Same hardware, same data loss conditions, five tools, documented results.

The differences were significant. In some scenarios the gap between the best and worst tool was the difference between full recovery and zero recovery. Here's what I found.

The 4 Test Scenarios I Used to Rank These Tools

Before the rankings, a quick breakdown of the failure scenarios I used, because the right tool depends entirely on what kind of NAS failure you're dealing with:

• Scenario A: Accidentally deleted share folder on a live Synology DS920+ (BTRFS, RAID 5, accessible over network)
• Scenario B: QNAP TS-453Be that stopped booting after firmware update (drives pulled, connected via USB adapters)
• Scenario C: Four-drive RAID 5 array with two failed disks, beyond the RAID's fault tolerance
• Scenario D: Single EXT4-formatted drive with corrupted partition table, connected directly to a Mac

Not every tool was tested on every scenario, some simply couldn't attempt certain scenarios due to OS limitations or feature gaps. Where a tool couldn't be tested, I've noted why.

1. Stellar Data Recovery Technician, Best Overall NAS Data Recovery Software

Platforms: Windows and Mac | Price: $199/year (Technician) | Free Trial: Yes, scan and preview before buying

After running all five tools through these scenarios, Stellar Data Recovery Technician finished first by a wider margin than I expected going in. What makes it stand out isn't any single feature, it's the combination of things it can do that no other tool on this list handles simultaneously.

Scenario A (Live Synology, deleted share folder): Passed

Stellar connected to the Synology via IP address, detected the BTRFS volume structure correctly on the first attempt, and completed a full scan in about 52 minutes. The deleted share folder surfaced with its complete directory structure intact and files fully previewed before any recovery action. Recovery was clean, filenames, folder structure, and file integrity all preserved. This is Stellar's strongest scenario, and it shows.

Scenario B (Dead QNAP, drives pulled): Passed with caveats

With the four QNAP drives connected via SATA-to-USB adapters, Stellar attempted automatic RAID detection. It got the RAID level right (RAID 5) but proposed an incorrect disk order initially. Manual correction of the disk sequence took about ten minutes, and from there the deep scan ran for four-plus hours. Recovery rate: approximately 78% of total data. Larger video files showed partial corruption....