Updating your MacBook or iMac should be free of headaches and drama. Apple even coined a marketing phrase “it just works!” But recently, a lot of readers and Mac users are finding the opposite–it just doesn’t work! Several users have recently had issues updating their MacBook with the latest version of macOS. The update gets stuck with a message “mac os could not be installed on your computer an error occurred installing mac os.” And then your Mac prompts you to quit the installer and restart your computer. Well, Apple, whatever happened to it just works???
- 1 Getting macOS could not be installed on your computer?
- 2 How-To Fix macOS could not be installed issue
- 3 Removing Third Party KEXT Files
- 4 Problems? Try Single User Mode
- macOS High Sierra Update, What You Should Know
- macOS Needs to Update Your Library, How-To Fix
- MacBook Slow after macOS Upgrade, Tips to Consider
Getting macOS could not be installed on your computer?
If you are experiencing this issue with your update, here are a few tips that you can use to address this issue. Before proceeding with the steps below, we suggest that you try out the basic NVRAM reset on your computer. Use Apple’s how-to if you are not sure about how to do the NVRAM reset.
The other thing is to make sure that your MacBook/Mac has enough space available to complete the update. If you are running low on space, Apple provides some guidelines that can help you recover some space on your Mac.
Now, that we have taken care of the basics, we suggest that you try each of the processes below until your macOS install problem is fixed. We have tried to arrange the how-to-fix steps in three separate categories.
The first of the troubleshooting steps walk you through Safe mode options and then we suggest the Recovery mode. The last of the options shows you how to remove third-party KEXT files using simple terminal commands and then try the install process.
How-To Fix macOS could not be installed issue
Fixing the Install issue using Safe Mode on your Macbook
- One of the best practices around updating is to make sure that you have taken a backup of the system before doing any troubleshooting. Better Safe than Sorry. We are assuming that you have already backed up your machine before you proceed with any of the steps below.
- The first thing to try is to get your Mac/MacBook into Safe mode. When you hold the ‘Shift’ key during startup, your computer will launch into Safe mode.
- Safe mode essentially forces the launched process to ignore all third party launch daemons and startup items. Once you are in the Safe mode, the next course of action is to get into Disk Utility. Once your MacBook has entered safe mode, you will see it indicated in the top right-hand corner of your screen.
- Log in using your credentials and then go to your macOS Utilities folder. Here you will need to start up the Disk Utility Program. Once in the program, Click First Aid on the top and choose the volume (Your main HDD) and start the repair process.
- Once the Repair has completed, you will be notified of the status. At this point, you would want to run the macOS Update program again and see if it works for you without giving you the error message.
If you tried the steps above in Safe mode and did not find success, the next course of action is to try the Recovery mode.
Fixing macOS Install Problem in Recovery Mode
- In order to get to recovery mode on your Mac or MacBook, you will need to press and hold Command + R keys together when booting up your computer.
- Once you are in the Recovery mode, click on the Apple logo on the top left corner of the screen and make sure that your startup disk is pointing to the Mac Boot disk.
- Now find the macOS update program and run the update.
Sometimes, when you are facing install/upgrade issues, a workaround that works for many users is to create an external bootable installer and try to run the install program using it. Apple provides a detailed white paper on this process. You can create the bootable installer on a USB and then try it to update the macOS.
Removing Third Party KEXT Files
If you are still reading and have already tried the series of fixes in both Safe mode and Recovery mode to no avail, you may have to roll up your sleeves and do a little more digging into the root cause of the issue. Sometimes it’s the third party KEXT extensions that cause a lot of heartache during update/install of macOS.
These KEXT Files get added onto your Mac/MacBook when you are using third-party devices. If you are not sure about it, your best bet is to look and see what third-party extensions are currently there on your machine.
In order to do so, Open up terminal from your utilities and type in the following to see the non-Apple KEXTs.
Kextstat | grep –v com.apple
This should show you all the third party extensions. Now you can remove them one by one or remove the one that you think may be the suspect. Using terminal you can unload the kext my using the following command.
sudo kextunload /System/Library/Extensions/NAMEOFTHEKEXT.kext
Here ‘NAMEOFTHEKEXT’ needs to be replaced with the appropriate suspect KEXT file that you found above. Once you have unloaded the KEXT, you can go back and check to make sure that it has indeed been removed by using the kextstat command.
Once you have removed all the third party KEXT files and have made sure that you have enough space on your machine for the macOS update, please try and launch the install process again.
Problems? Try Single User Mode
If your install process is failing because of a particular problematic file, you can also try to log in using the single user mode and delete that particular file and then try resuming the install. Sometimes you find these problematic one off files in the Installer log files. In order to access these log files, open up the Console app in utilities and click on ‘/var/log’ on the left hand column and then choose ‘instal.log’ in the next column.
We are hoping that you were able to fix the macOS Install issue using some of these tips. If you have tried everything without any success, your best bet is to reach out to Apple Support folks so that they can help out. Please let us know how your install worked by using the comments below.
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