Safe Mode For Mac Sierra
Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
Safe mode helps resolve any issues that may prevent your Mac from starting up completely or isolates issues related to your startup disk. Related: How to Boot to Safe Mode in Windows 10. How to Start Up Your Mac in Safe Mode. Start your Mac. If it was on, restart it. Press and hold the Shift key. You’ll see the Apple logo appear on. Mar 29, 2019 Steps 1. Prompt your Mac to restart. If your Mac is currently on, you'll need to begin restarting it before you can access. Press and hold the ⇧ Shift key. As soon as your Mac begins restarting, hold down the ⇧ Shift key and don't let go. Wait for the login screen to appear. This screen will. Change Security preferences in Safari on Mac. In the Safari app on your Mac, use Security preferences to turn security warnings on or off. Also enable or disable JavaScript. To change these preferences, choose Safari Preferences, then click Security. Open Safari for me. Safe mode and single-user mode are two of the special start-up modes that your Mac can be powered up to. They’re often used to troubleshoot issues a Mac may be experiencing or to assist in isolating and repairing some common issues that can keep a Mac from starting up correctly, or that make it act strangely when it’s in use.
Safe mode is particularly useful when you're trying to resolve an issue that doesn't seem to be associated with using any particular app. As always, keeping your software up to date is the first step toward resolving any software issue.
How to use safe mode
- Turn on or restart your Mac, then immediately press and hold the Shift key as your Mac starts up.
- Release the key when you see the login window, then log in to your Mac.
- You might be asked to log in again. On either the first or second login window, you should see ”Safe Boot” in the upper-right corner of the window.
If the issue continues in safe mode
If the issue continues while in safe mode, or your Mac restarts several times and then shuts down while starting up in safe mode, you should reinstall macOS and make sure that your Apple software and third-party apps are up to date.
If the issue doesn't continue in safe mode
If the issue doesn't continue while in safe mode, leave safe mode by restarting your Mac normally. Then test for the issue again. The issue might be resolved.
If the issue returns after leaving safe mode, startup items are probably at fault. Apps can install such items in numerous places, and they aren't always easy to find or recognize. For that reason, you should first make sure that you've installed any available updates for your Apple software and third-party apps.
If updating your software doesn't help, try any of these solutions:
- Unplug all accessories from your Mac, including printers, drives, USB hubs, and other nonessential devices. You could have an issue with one or more of those devices or their cables.
If you still need help, please contact Apple Support.
Learn more
Some features might not work in safe mode, such as movie playback in DVD Player, video capture, file sharing, Wi-Fi, some accessibility features, some audio devices, and some devices that connect via USB, Thunderbolt, or FireWire. Accelerated graphics are disabled, which could cause blinking or distortion onscreen during startup.
Mac won't start/boot after macOS High Sierra update/installation, help!
'I upgraded my iMac into latest macOS High Sierra last night. And when I completed the update process, tried to start the computer. It won't boot.
I tried to hard reboot Mac computer, but nothing showed up. What else can I do to wake up the computer and make it work again with macOS High Sierra?'
Although Mac hard drive boot failure issue is not a new problem anymore. But it's still a tough case for ordinary users to fix when their Mac computers fail to boot after macOS High Sierra update or installation. If you are having such a problem, relax! This tutorial article will show you how to quickly fix and resolve Mac hard drive won't boot issue after macOS High Sierra update. Just follow any one of offered methods to get your Mac computer back to work again now:
Quick Fix 1. Reset SMC to fix Mac won't boot after High Sierra update
Sometimes, if the Mac computer cables are not connected properly, you may not be able to boot it normally. So if Mac cannot boot after system update, you can reset SMC to fix Mac won't boot issue after macOS High Sierra update:
1. Shut down Mac computer and unplug all cables;
2. Wait for a few minutes and then plug the cables back;
3. Restart Mac computer to see if you can enter the system or not.
Quick Fix 2. Force to reboot Mac and reset NVRAM to fix Mac won't boot issue
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 problem gets solved or not.
Note: If these two quick fixes didn't help, continue with below complete solutions to get your problem resolved now.
Complete solution to fix Mac won't boot/fails to boot error after macOS High Sierra update
Step 1. Recover data when Mac hard drive won't boot from High Sierra
If you have important data saved in Mac computer hard drive, do remember to restore data before taking actions to fix Mac won't boot error.
Professional Mac data recovery software with bootable disk can help you effectively restore your data out of Mac hard drive when the computer fails to boot. You can directly purchase EaseUS Data Recovery Wizard for Mac with Bootable Media to create a bootable media for Mac and apply it to restore data from fail to boot Mac computer now:
1. Insert the created bootable media into Mac and turn on Mac computer, immediately press and hold the Option key and select EaseUS Data Recovery Wizard for Mac to boot;
2. Connect an external storage device to Mac computer;
When EaseUS Data Recovery Wizard for Mac launches, follow this tutorial to restore lost files on Mac.
Step 2. Fix Mac won't boot error after macOS High Sierra update
Fix macOS High Sierra won't boot issue
Method 1. Boot Mac from Safe Mode to fix Mac won't boot issue
1. Turn on Mac, press Shift when you hear the startup sound and release it till you see Apple logo;
2. After Mac fully starts, restart the computer normally without holding any keys/buttons.
3. Wait patiently till Mac computer finish the reboot process.
Method 2. Use Disk Utility to restore Mac from Recovery Mode when macOS High Sierra won't boot
1. Boot Mac up, press Command + R during the boot-up process;
2. Click Disk Utility option > Click First Aid and try repairing Mac's disk;
3. Disk Utility will automatically run a fsck (file system check) operation to help you repair macOS High Sierra fail to boot error;
4. If this fails, try restore from Recovery mode.
5. Reinstall OS X in Recovery Mode will automatically download and install the latest macOS High Sierra for your Mac device.
Method 3. Run Terminal to repair Mac hard drive won't boot error due to High Sierra update
1. Open Terminal > Applications > Utilities;
Enter: system_profile SPExtensionsDataType > ~/Desktop/kextList.txt and hit return;
2. Open the kextList.txt file on desktop > Press Apple(Command) + F to bring up find;
3. In the find field insert 'Obtained from: Not Signed' and copy the destination to the .kext file to a list for use later;
4. Click Next to cycle through all of them, for example: /System/Library/Extensions/JMicronATA.kext
5. Browse your drive to /System/Library/Extensions and remove all unsignedkext files;
6. Reboot and your Mac boot problem shall be all set.
Safe Mode For Mac Sierra Vista
Method 4. Reinstall macOS High Sierra to resolve Mac won't boot issue
The last method that you can try is to download macOS High Sierra and create a new bootable drive to clean install macOS High Sierra on Mac computer so to make it boot up normally and work smoothly again.
1. Connect USB bootable drive on Mac and restart Mac by holding Option till you hear the reboot tone;
2. Select disk called Install macOS High Sierra in the drive list that appears on screen;
3. Once USB drive is booted, select Disk Utility > Choose Mac's startup from the list > Click Erase;
4. Once Mac's startup disk is formatted, return toUtilitieswindow and select Install macOS > Choose just erase startup drive to install macOS > Follow onscreen prompts to complete the installation.
Safe Mode For Mac
Call of duty for mac os sierra. This may take you a few hours to complete the task. And of course, if you have important data, follow Step 1 to get all saved data out firstly.