- Go to the Apple icon in the top left corner of your screen and choose Restart from the menu.
- Hold both Command and R keys to enter Recovery Mode. ...
- Select Reinstall macOS.
- Choose your hard drive, usually MacintoshHD (or whatever you named your drive)
How to downgrade macOS from High Sierra to Sierra?
- Make a bootable installer on a memory stick - follow these instructions: how to create a bootable installer of macOS
- Connect the bootable installer to your Mac.
- Open System Preferences and click Startup Disk.
- Choose the external drive with your installer as the startup disk and click Restart.
- Your Mac will shutdown and restart in Recovery mode.
How to clean install macOS High Sierra On Your Mac?
- Connect your boot drive.
- Start up - or restart - your Mac while holding down the Option key (also known as Alt). ...
- Choose to install your chosen version of macOS from the external drive.
- Select Disk Utility.
- Select your Mac's start up disc, probably called Macintosh HD or Home.
- Click on Erase.
- Wait for your startup disk to be formatted.
How can I re-install high Sierra?
You can reinstall macOS Sierra or macOS High Sierra by doing the following:
- Back up the Mac before beginning
- Reboot the Mac and hold down COMMAND + R keys concurrently right after you hear the boot sound, this will boot the Mac into Recovery Mode
- At the "macOS Utilities" screen choose "Reinstall macOS"
- Click "Continue" and walk through the setup screen
How to downgrade from macOS Mojave to High Sierra?
Downgrade macOS (e.g: Downgrade macOS Mojave to High Sierra) 1. Plug an external USB drive (with 16GB min), launch Disk Utility, and select the USB drive, click Erase. 2. Rename the USB drive as "MyVolume" and choose APFS or Mac OS Extended as the format, click Erase. Quit Disk Utility when the process is done.
How do I reinstall macOS High Sierra?
Reinstalling macOS does not remove data from your Mac. To begin installation, select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
How do I fix a corrupted macOS?
How to Fix a Corrupted Hard Drive on a MacRepair the Corrupted Hard Drive Using Disk Utility. ... Initiate the FSCK Command. ... Try Free Software to Recover Mac Hard Drive Data. ... Recover from a Time Machine backup drive. ... Hire a hard drive recovery service for Mac.
Why is my install macOS High Sierra damaged?
The cause of this error is an expired certificate, and because the certificate is expired the “Install macOS” app for Mojave, Sierra, and High Sierra will not run. Fortunately, there is a fairly simple solution to the “damaged” installer problem.
How do I repair my Mac startup disk?
Repairing a diskRestart your Mac, and press Command + R, while it's restarting.Select Disk Utility from the macOS Utilities menu. Once Disk Utility has loaded, choose the disk you wish to repair - the default name for your system partition is generally "Macintosh HD", and choose 'Repair Disk'.
How do I boot my Mac into recovery mode?
Keep holding until the described behavior occurs. Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet.
How do you fix macOS could not be installed?
What to Do When the macOS Installation Couldn't Be CompletedRestart Your Mac and Retry the Installation. ... Set Your Mac to the Correct Date and Time. ... Create Enough Free Space for macOS to Install. ... Download a New Copy of the macOS Installer. ... Reset the PRAM and NVRAM. ... Run First Aid on Your Startup Disk.More items...•
How do you fix this copy of the install macOS Big Sur application is damaged and can't be used to install macOS?
Question: Q: This copy of the Install macOS Big Sur application is damaged, and can't be used to install macOS. Answer: A: Answer: A: Drag and Drop the new Application in Applications folder " Install Big Sur " to the trash.
Where can I download high Sierra installer?
MacOS High Sierra is available as a free update via the Mac App Store. To get it, open the Mac App Store and click the Updates tab. MacOS High Sierra should be listed at the top. Click the Update button to download the update.
High Sierra Installer Won’T Download
If you’re trying to download the macOS High Sierra installer, you’ll need to have signed up to App Store. If you’ve done that, and managed to start...
Macos High Sierra Won’T Install
If the download completes successfully but the installation doesn’t finish, force quit the installer using the same procedure as above. 1. Restart...
Getting The Rainbow Wheel Every Few Seconds After Upgrade
Check console.app and if you’re getting errors from sandboxd and hidd (IOKit), your problem is a third party software. It’s probably because it was...
What If Macos High Sierra Stops responding?
If your Mac hangs and you can’t do anything at all, wait up to half an hour to see if that helps. If not, force your Mac to restart by holding down...
Macos 10.13 High Sierra Keeps Logging Out
In case you’re getting tired of you new OS kicking you out of your account on random occasions, there’s a chance it’s pretty easy to turn it off. F...
How to Fix USB Devices Not Recognized on High Sierra
It’s not a nice thing to find out after getting a brand new system, but some Macs have been struggling with USB devices after the upgrade. If your...
Security Issues in High Sierra: Password Stealing
The only known and relatively famous security issue with the latest macOS is the password stealing code created by security researcher Patrick Ward...
How to Fix Mac Running Slow on Macos High Sierra
In case you’ve just upgraded to the new macOS and your Mac runs slower than it used to, worry not. It’s common and it’s not exactly an issue. The t...
Fix Problems With Apps Compability
With every macOS upgrade there are older versions of apps that are no longer supported by their developers. One casualty of High Sierra is Microsof...
Display Issues on High Sierra
A few things can go wrong with your Mac’s display after the upgrade, so let’s see what can be done when they occur. You might experience troubles w...
“Macos High Sierra Download Has failed.”
As soon as you started downloading macOS 10.13 the download would end abruptly and you will get messages like the one above. You may be shown “Inst...
Macos High Sierra Installation Is Frozen
You downloaded macOS High Sierra and clicked the installation file, but for some reason, nothing happens. You clicked Continue, but the now button...
Not Enough Disk Space to Install Macos High Sierra
macOS High Sierra takes about 8 GB on a drive. Though it doesn’t seem terribly much, it is still recommended to have at least 15-20 GB of storage f...
Time Machine Is Stuck on Backup
This issue has been reported since El Capitan and unfortunately is still the case in macOS High Sierra. The Time Machine hangs while showing “Prepa...
Macos High Sierra Is Slow Or Freezes at Random
Try giving the system some time to configure itself. If it doesn’t help, reboot your Mac. Some users reported their Mac was running slower after ma...
Mac Won’T Start After Upgrading to Macos High Sierra
So you have successfully installed macOS High Sierra, but for some reason, your Mac won’t boot up. You may try to reset NVRAM in this case. NVRAM s...
Wi-Fi Is Slow on Macos High Sierra
Some people reported their Wi-Fi dropping off after installation of macOS High Sierra. You may also notice your connection got slower. To tackle th...
Your Apps Crash on Macos High Sierra
This is a common issue as Apple has moved to the 64-bit architecture with the release of macOS High Sierra. The implication is that a whole scope o...
Battery Drains Too Fast on Macos High Sierra
Has your battery life reduced after upgrade to macOS High Sierra? This issue has also been reported since June 2017 High Sierra Beta release. To lo...
Password Problems on Macos High Sierra
Advertised as the "most secure Apple’s macOS", High Sierra looks a total opposite, just months after its release. Three 3 major password scandals h...
Getting the rainbow wheel every few seconds after upgrade
Check console.app and if you’re getting errors from sandboxd and hidd (IOKit), your problem is a third party software. It’s probably because it wasn’t supported by the new APFS file system. It tries to repeatedly update causing your Mac laptop to be stuck in an endless loop.
What if macOS High Sierra stops responding?
If your Mac hangs and you can’t do anything at all, wait up to half an hour to see if that helps. If not, force your Mac to restart by holding down the power button and waiting for it to shutdown and then start again.
macOS 10.13 High Sierra keeps logging out
In case you’re getting tired of you new OS kicking you out of your account on random occasions, there’s a chance it’s pretty easy to turn it off. For instance, there is a setting in your Security & Privacy menu that is responsible for that.
How to fix USB devices not recognized on High Sierra
It’s not a nice thing to find out after getting a brand new system, but some Macs have been struggling with USB devices after the upgrade. If your Mac is one of them and refuses to see or read USB drives, external drives, and so on, try resetting SMC.
Security issues in High Sierra: Password Stealing
The only known and relatively famous security issue with the latest macOS is the password stealing code created by security researcher Patrick Wardle.
How to fix Mac running slow on macOS High Sierra
In case you’ve just upgraded to the new macOS and your Mac runs slower than it used to, worry not. It’s common and it’s not exactly an issue. The thing is that your Mac is reindexing a bunch of files while running a new system and it slows down its productivity and performance.
Fix problems with apps compability
With every macOS upgrade there are older versions of apps that are no longer supported by their developers. One casualty of High Sierra is Microsoft Office 2011 for Mac. Microsoft has said that it will not offer support for it running on new macOS and it’s likely you’ll have problems with it. The only solution is to upgrade to Office 2016.
2. macOS High Sierra installation is frozen
You downloaded macOS High Sierra and clicked the installation file, but for some reason, nothing happens. You clicked Continue, but the now button appears to be greyed out. Control + click the installation icon —> Choose Quit. Go to Applications to find the macOS High Sierra Installation file. Repeat the installation.
3. Not enough disk space to install macOS High Sierra
macOS High Sierra takes about 8 GB on a drive. Though it doesn’t seem terribly much, it is still recommended to have at least 15-20 GB of storage for macOS High Sierra to run smoothly. But first of all, figure out what's taking up your valuable space.
4. Time Machine is stuck on Backup
This issue has been reported since El Capitan and unfortunately is still the case in macOS High Sierra. The Time Machine hangs while showing “Preparing backup message” and may stay unresponsive for hours.
5. macOS High Sierra is slow or freezes at random
Try giving the system some time to configure itself. If it doesn’t help, reboot your Mac. Some users reported their Mac was running slower after the macOS High Sierra update. Check out this guide on how to speed up your Mac and try these tips on your machine. First, figure out what’s causing the slowdown.
7. Wi-Fi is slow on macOS High Sierra
Some people reported their Wi-Fi dropping off after the installation of macOS High Sierra. You may also notice your connection got slower. To tackle this, update your Wi-Fi preferences. First, you will need to remove the current settings which is quite easy to do.
8. Your apps crash on macOS High Sierra
This is a common issue as Apple has moved to the 64-bit architecture with the release of macOS High Sierra. The implication is that the whole scope of 32-bit applications will not be supported on the new macOS update. Not all developers have yet converted their apps to 64-bit, but it's a question of time, really.
9. Battery drains too fast on macOS High Sierra
Has your battery life reduced after upgrade to macOS High Sierra? This issue has also been reported since June 2017 High Sierra Beta release. To look deeper into the issue, go to Activity Monitor to check what processes are most energy-demanding. Just go to Applications -> Utilities -> Activity Monitor. Click the Energy tab for details.
Mac fails to start up after High Sierra update
There's a reason why you should always back up your Mac before upgrading your OS. Installing a new operating system is a big process, and unforeseen issues can arise. If your Mac won't start up after installing High Sierra, you can take steps to resolve the problem.
Mac keeps logging you out of High Sierra
Inexplicable logouts are a common issue in macOS High Sierra. If the logout bug bites you, several steps can help solve the problem. Some solutions involve changing macOS settings, while another requires you to disable a feature in a third-party browser.
Mac slows down after High Sierra upgrade
If your Mac is running a lot slower after a High Sierra upgrade, several troubleshooting tips can help isolate and resolve the issue. Before you try anything too complex, you should first restart your Mac if you haven't already. Often, such a simple step can resolve many issues.
MacBook short battery life after High Sierra upgrade
Shorter battery life after an upgrade could be the result of installing a more resource-hungry OS. If, however, your battery is draining much faster than expected, you can use the Energy tab in Activity Monitor to identify any apps that are consuming a lot of power.
Mail app issues in High Sierra
When you upgrade to High Sierra, sometimes the new OS can cause issues in your mail app. Fortunately, the common fixes are simple to action.
High Sierra fixes and workarounds
Apple generally resolves most common OS issues with updates. However, the fixes don't flow forever, and sometimes certain bugs survive until the end of an operating system's life cycle.
3. Mac lagging
If your Mac device just starts lagging out or it stops responding, our first suggestion is that you wait about 10 to 15 minutes to see if it can fix the issue on its own. Typically, this will be much more than enough.
5. Slow Mac after the update
Right after you install macOS High Sierra you might face one of the most common problems: that your Mac got a lot slower than it used to be, but you don’t need to worry. In fact, this is very common, since your device needs to sort through a lot of files to use Spotlight and other features.
7. WiFi issues
Mac WiFi issues are common and very simple to solve as well. Before anything else, make sure that your internet works on your other devices and try rebooting your router. Next up, reconnect to the network on your computer, or even try rebooting it as well to see if things go back to normal.
8. Problems with Bluetooth
Unfortunately, it is also very common to find problems with Bluetooth devices on Mac. To fix the situation, try unplugging and plugging back in the device on your computer a few times.
9. Display issues
Many people have also faced problems with the display on their macOS devices after installing the High Sierra version, which is common. In some cases, the screen will show a blinking light or a solid color, such as grey or green.
10. Apps not working
It is entirely normal that some of your apps installed on your Mac stop working properly after you update your system to the macOS High Sierra version, being one of the most common problems here.
11. USB devices are not recognized
In some cases, you might face situations in which certain USB devices are not recognized by your Mac device. Before anything else, make sure that they work properly on other computers to see if the problem is on the Mac itself or not.
Start up from macOS Recovery
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
Other macOS installation options
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:
Before You Begin: Back Up Your Data
Although the process of reinstalling is safe, it is still recommended to back up your data. Should something go wrong, you’ll be able to restore all necessary files easily.
A Step-By-Step Guide to Reinstall macOS High Sierra
Here’s how you can reinstall the macOS High Sierra and keep all files and user settings.
Why is my macOS Installer Damaged?
If you tried to use a macOS installer in the last few days or weeks, you may have been met with an error message saying something like " This copy of the Install macOS Mojave.app application is damaged, and can’t be used to install macOS. "
How to Fix a Damaged macOS Installer
To fix the damaged installer, you should just download the installer again. Doing so will also ensure that you have all of the macOS updates that have been released since you made the original installer, meaning you won't have to update macOS immediately after the initial installation is complete.
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Introduction
Note: If you’re trying to install the latest MacOS on a 2009 and later Apple computer, follow the MacOS internet recovery guide instead.
Step 1 How to Install macOS High Sierra
With the device powered off, disconnect any external hard drives and flash drives.
Step 2
Your Mac will begin copying the installation files from the flash drive. This may take up to 30 minutes.
Step 3
If you don't need to pre-configure your hard drive, skip to step 5. If you're not sure or if the drive is used, it's a good idea to pre-configure your hard drive.
Step 5
Select "Reinstall macOS" from the menu and press [enter] or click "Continue."
