How To Fix macOS Could Not Be Installed On Your Computer Error?

While working on your Mac machines, there is one thing that you will never want to encounter. The error message that says “macOS could not be installed on your computer.” We all want our gadgets and machines to work properly and never encounter such abnormalities.


However, many times while we try to install an OS update, we do face Mac update issues. Sadly, we do not even know how to rectify this error. Thankfully there are ample ways of using which you can restore your Mac to a working state and have it working as before.


Probable Causes Of the “macOS Could Not Be Installed’ Error”:


You may encounter the error due to many reasons some of which are listed below, These are the different types of error messages you may get:

The below mentioned are exact error messages displayed so cannot be changed:

  • “The pat /System/Installation/Packages/OSInstall.mpkg appears to be missing or damaged.”
  • “Storage system verify or repair failed.”
  • “An error occurred installing macOS.”
  • “An error occurred while verifying firmware.”
  • “Unable to unmount volume for repair.”


All these error messages describe the error being encountered at different times during installing an update.

Let’s now read how you fix macOS could not be installed on your computer error.


How To Fix macOS Could Not Be Installed On Your Computer Error?


1. Restart Your Mac:

This is the first and most common solution to every error. Restarting usually fixes the common bugs and abnormalities in the Operating System.

So if you are facing mac update issues, simply try to restart your machine and see if everything has been sorted.


2. Keep A Check On The Date And The Time Setting:

Another probable cause of the error while updating the macOS is a faulty date or time. Many times the date and time does are incorrect and hence you encounter errors in your Mac. A simple solution is to check for the correct date and time and if they do not match, update them in order to resolve the problem. To check the date and time follow the steps below:


  • From the main screen, navigate to System Preferences and then Date & Time.
  • In order to check the Date & Time click on the Lock icon present on the bottom-left corner of the screen. This will ask you for your Mac password, Enter the password to make changes.
  • Post this click on the option named Set date and time automatically.
  • Doing so will update the correct time and date.
  • Restart your Mac to see the problem has been resolved.


3. Declutter Your Mac:

We all tend to just stuff our Macs with unwanted stuff and gradually fill up the entire storage space. As a result, the Mac starts to perform poorly and slowly. Many times when there is a shortage of disk space, and you try to install and update, there is a high probability that you will encounter macOS that could not be installed on your computer.

In such cases, it is always advised to keep enough space free on your Mac so that the update can be installed properly. To declutter your Mac you should remove unwanted files/old downloads/ junk files/ partial downloads/ unwanted applications, etc from your Mac and restore a significant amount of storage space.

To do so:

  • Click on the Apple Logo on the Home Screen.
  • Click on About This Mac and then click on Storage.
  • This will give you a breakdown of space occupied by different kinds of data. Simply locate the unwanted data and remove it.
  • You can also use an optimization tool like Disk Clean Pro or Advanced Mac Tuneup to optimize your Mac.


4. Remove and Download the Installer:

Another reason behind receiving the mac update error is a faulty installer. Installer resides in the Downloads folder, so to locate it and install it follow the steps below:

  • Navigate to the Finder on your Mac.
  • In the Finder, type Downloads and press Enter.
  • This will redirect you to the Downloads folder.
  • In the Downloads folder locate the macOS Installer and then move it to Trash.
  • After you have moved it to trash, download and reinstall it.


5. Restore The Mac To An Earlier State Which Is More Compatible With the Installer:

Mac comes with an inbuilt TIme Machine using which you can restore the Operating System to an earlier date that is compatible with the macOS Installer. So if you want to resolve the macOS could not be installed on your computer, you can make use of the Time Machine feature.


To do so,

  • Attach the backup drive and then Restart your Mac. While attempting to Restart long-press the keys Command + R and wait for the Apple Logo. From the list of options that appears, click on macOS Utilities.
  • Here, choose the options called Restore From Time Machine Backup. Post this click on Continue.
  • Again click Continue to proceed.
  • After this, look for the drive where the backups are stored and click on it. After this click on Continue again.
  • From the next screen look for the latest backup and click on it. Post this again click on the Continue option.
  • Doing so will start the restoration process.


Restoring your Mac will in most cases resolve the Mac update issues. In case you are still not able to resolve the macOS could not be installed on your computer error, we suggest you get it repaired from an authorized center.

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