Summary: This article offers 6 methods to fix iMac that won't boot past the Apple logo. To rescue data from an unbootable iMac, you can use iBoysoft Data Recovery in macOS Recovery mode.
All Mac computers could arise booting issues. For instance, an iMac won't boot past Apple logo. Sometimes, you could see Mac stuck on a loading bar with Apple logo or a spinning wheel (or both). Some other times, as startup continues, the Mac stuck on login screen.
In this case, your Macbook won't turn on. You can't access files stored on the Mac either. Then, what can you do if the iMac won't past Apple logo?
This article shows you how to fix iMac that stuck on the Apple logo. As your later operations on Mac may cause data loss, you'd better rescue files from your Mac first.
How to fix iMac not booting past Apple logo
When an iMac or MacBook won't boot past the Apple logo, you surely can do something to fix it. But to prevent permanent data loss, please make sure you have retrieved data from your Mac.
Then, you are safe to fix the iMac that stuck on the Apple logo with those 6 solutions.
- 1. Disconnect all third-party peripherals
- 2. Start the computer in Safe Mode
- 3. Reset your Mac's PRAM and NVRAM
- 4. Reset the System Management Controller (SMC)
- 5. Fix the Mac in macOS Recovery Mode
- 6. Check hardware errors with Apple Hardware Test
Fix 1: Disconnect all third-party peripherals & restart your Mac
Sometimes, third-party peripherals connected to your Mac could cause trouble. You can first shut your Mac down, and then disconnect all wired and wireless peripherals. This includes your printers, USB C adapter, keyboard, mouse, etc.
Then you can restart your Mac, wait for it to boot up, and see if it can go past the Apple logo screen. If it doesn't work, you can step further.
Fix 2: Try Safe Mode to fix Mac that stuck on Apple logo
To diagnose which part goes wrong more easily, you can try to boot Mac into Safe Mode. A Mac safe boot will verify your startup diskand repair file system errors.
What's more, a safe boot can move unnecessary caches to the Trash and disable all login items. This will isolate other related programs, making it easier to fix the Mac won't boot past the Apple logo issue.
To boot up your Intel-based Mac in Safe Mode:
- 1. Long press the power button to completely shut the Mac down.
- 2. Restart the Mac while holding down the Shift key.
- 3. Release the Shift key when you see the loading bar.
To start up an Apple M1 Mac in Safe Mode:
- Shut down your Mac and wait for seconds.
- Hold down the power button until seeing the available startup disks and Options on screen.
- Select your startup disk. Then, press and hold the Shift key, click Continue in Safe Mode.
If your Mac loads successfully in Safe Mode, the Mac that won't boot past the Apple logo screen should be caused by software incompatibility.
As a rule of thumb, usually the recent installed third-party software is the troublemaker. You can uninstall it directly and restart your Mac.
If it's in vain, you can restart your Mac into Mac Verbose Mode (Command + V at startup). In Verbose mode, you can see a live report of the booting process.
Then, you'll know which part your Mac gets stuck with. Once you find the incompatible programs, you can simply uninstall it in Safe Mode.
Fix 3: Reset your Mac's PRAM and NVRAM
NVRAM and PRAM are memories used to storesetting information. They include sound volume, display resolution, startup-disk selection, time zone, and recent kernel panic.
So, when an iMac or MacBook Pro stuck on the Apple logo during booting, try to reset these settings.
Note: NVRAM is available on M1 Mac, but it is configured to run test on startup and reset the NVRAM automatically if needed.
- 1. Press and hold Power button for a few minutes till Mac turns off.
- 2. Wait a few seconds and press Power button to turn on Mac.
- 3. Hold Command + Option + P + R keys while booting Mac to reset NVRAM.
- 4. Reboot computer again to see if the Mac computer can boot past the Apple logo.
Fix 4: Reset the System Management Controller (SMC)
SMC is responsible for power, battery and charging, fans, and sensors. When you Mac stuck on the Apple logo screen, or sleeps or shuts down unexpectedly, you can try resetting the SMC. Note that there is no SMC on M1 Mac.
For Notebook computers with the Apple T2 chip, you need to:
- 1. Force your Mac to turn off.
- 2. On your built-in keyboard, press and hold Command + Shift + Control keys for 7 seconds.
- 3. Then hold and press the Power button as well. You need to keep hold all four keys for another 7 seconds.
- 4. Wait for seconds and then restart your Mac.
It works for all Macs using non-removable battery. It includes MacBook Air models, as well as MacBook Pro models introduced in mid 2009 or later. But it excludes MacBook (13-inch, Mid 2009).
It's different to reset SMC for Notebooks using removable batteries and desktops like Mac mini and iMac. You can reset the SMC when your MacBook is stuck on Apple logo.
Fix 5: Fix the Mac in macOS Recovery Mode
Mac Recovery mode is a built-in recovery system on your Mac. When your Mac won't go past the apple logo, macOS Recovery Mode allows you to fix the issues and make your Mac can boot up again.
How to boot into macOS Recovery Mode?
To boot your Intel-based iMac into macOS Recovery Mode:
- 1. Force your Mac to turn off by long pressing the power button.
- 2. Restart the Mac and immediately hold Command + R keys. You can release the keys until you see the Apple logo.
Tips: Sometimes you can't boot into macOS Recovery mode. Then you might want to boot into macOS Recovery mode over the Internet. You can simply press and hold Option + Command + R or Shift + Option + Command + R at startup.
After entering Mac Recovery mode, you can get down to fix your Mac.
1. Repair Mac hard drive in macOS Recovery mode
Usually, if your iMac is booting but the operating system is unable to load up, the reason could be your internal hard drive not mounting on Mac or unreadable. Fortunately, you can repair the disk with First Aid in macOS Recovery mode.
- Select Disk Utilities.
- Choose the internal hard drive on the left side bar of the Disk Utility window
- Click First Aid > Run.
Then, the Mac hard drive will be checked and repaired.
2. Free up Mac hard drive's space
Insufficient storage space in Mac hard drive can lead to some issues when the system loading on startup. The Mac could freeze at startup like stuck on the Apple logo, perform slow, or get stuck with a spinning beach ball while working.
In these cases, you can try to free up the hard drive space.
- 1. In macOS Recovery mode, open the Terminal utility.
- 2. Type ls /Volumes in the command prompt and hit Return. It will list all volumes on your Mac. You need to find the startup hard drive (often called Macintosh HD or macOS) by its name.
- 3.Type cd /Volumes/"Macintosh HD"/Library/ and hit Return.
- 4.Type rm -rf Logs/* and hit Return. This will remove some log files.
- 5. Type rm -rf Caches/* and hit Return to remove caches.
You can also run the find /home -size 1G command to locate files bigger than 1 GB. Then, you can choose to run mv command to move the files to an external hard drive. Or you can use rm command to delete them.
3. Remove incompatible Kernel extensions
Have you recently updated the Mac operating system or downloaded any patches? Mac not booting up could be caused by software incompatibility.
So, if the Mac can't boot past the Apple logo when macOS is updating or after an update, you can remove the conflicting kernel extensions.
- 1. Open Terminal in macOS Recovery mode.
- 2. Type mount -rw / to mounts your internal hard drive as writable.
- 3. Type cd /Volumes/Macintosh\ HD/Library/Extensions/.
- 4. Type mkdir Unsupported.
- 5. Type mv *.kext Unsupported.
Then the clashing extension would be removed. You can try to restart your Mac again.
4. Recover the system by APFS snapshot
Sometimes, the macOS update won't work with your model. But if you use macOS Big Sur, Catalina, High Sierra, or Mojave, you might have a chance to roll back system with APFS snapshot.
- Select Restore From Time Machine Backup or Restore From Time Machine.
- Select a local snapshot (the latest is recommended)
- Follow the instructions to downgrade the macOS.
If your confirmed that your Mac model is compatible with the current macOS but it has the boot failure issue, you can also reinstall macOS.
Note: Rolling the unbootable Mac back to a previous state may cause data loss. So, you'd better rescue files from the Mac first if you have anything important.
5. Reinstall macOS in macOS Recovery mode
If the above solutions failed, your startup disk may be corrupted. Erase your startup drive and reinstalling macOS is the last way to help you fix the Mac that stuck on Apple logo when booting.
This operation will make data loss. So, firstly, you should get files off the Mac with iBoysoft Data Recovery for Mac. Then, follow these steps:
- 1. Select Disk Utility in macOS Recovery mode.
- 2. Select Macintosh HD volume or macOS volume from the side bar.
- 3. Click on Erase from the top.
- 4. Setup the required information to reformat the disk and click Done when it's finished.
- 5. Right click the Macintosh HD - Data or macOS - Data volume (This volume stores your data) and select Delete APFS Volume.
- 6. Go back to macOS Utilities screen and select Reinstall macOS.
Then, follow the onscreen instructions to reinstall macOS.
Fix 6: Check hardware errors with Apple Hardware Test
If you are unable to erase the boot drive, there might be some hardware malfunctions on the drive. You can use Apple Diagnostics to help determine whether the startup disk is physically damaged.
If all the mentioned ways fail to boot up your Mac, it may have hardware problems, you should send it to a local repair center.
Why your Mac won't boot past Apple logo on startup?
To make you more clear about why the Mac stuck on the Apple logo, firstly, let’s learn how the Mac boots up.
Every time when your Mac is booting or restarting, it starts to check and verify hardware connections. Then, it checks if RAM, CPU, hard disk, GPU, etc. are working. After making sure these parameters are right, the Mac loads the startup hard drive and its system volume.
As the startup hard drive is detected, you can see the Apple logo with a loading bar on the Mac screen.
If the operating system (macOS) takes control of all hardware and software on your Mac, the Mac boots up. If the system fails to load the macOS information, or the macOS loses control of certain programs, the Mac won't boot past the Apple logo.
So, we can draw a conclusion that the Mac that stuck on the Apple logo usually results from file system corruption and software incompatibility. In rare cases, it causes by hardware issues or insufficient memory or storage.
Note: If you're reinstalling or updating macOS, the Apple logo might remain on screen for much longer than usual after your Mac restarts. You can wait long enough to check if the Mac stuck on the Apple logo.