An Error Occurred Whereas Making ready the Set up? Simple Fixes!

error occurred while preparing the installation mac

Chances are you’ll get the “An Error Occurred Whereas Making ready the Set up” error message whereas updating your MacBook to the newest macOS model.

This course of is often simple, however you might encounter replace issues. Many MacBook customers have the identical subject and get a popup set up error message whereas updating their MacBook.

This error seems if you attempt to set up, reinstall, or replace your macOS. This information walks you thru a number of troubleshooting steps you may strive.

Methods to Repair “An Error Occurred Whereas Making ready the Set up” on Mac

In case your MacBook says that an error occurred whereas getting ready the set up, boot into Protected Mode and ensure the date and time settings are right. Subsequent, boot into Restoration Mode, and attempt to reinstall the macOS with out erasing the drive. This can remedy the issue usually and eventualities.

Nevertheless, the error message might stay after the reboot. Don’t fear, we’ve acquired extra fixes so that you can strive.

1. Change/Test Date and Time

Once you need to improve or set up a brand new model of macOS, the installer tries to connect with the Apple servers. Servers routinely test the date and time of the connection.

In consequence, in case your MacBook date and time settings are incorrect, the installer reveals an error message indicating one thing uncommon occurred throughout the course of.

So, test the time and date settings earlier than beginning the improve/putting in the latest OS to make sure it’s right. There are two methods to do that; System Preferences and macOS Restoration.

System Preferences

  1. Open Apple Menu and choose System Preferences.
  2. Go to the Date & Time choice. 
  3. Allow Set date and time robotically.
  4. Be certain your area is appropriately chosen. 
  5. Restart your Mac and check out putting in/upgrading the macOS to test if the issue has been solved or not.

macOS Restoration Mode

  1. Energy off your Mac.
  2. Flip it on and press and maintain the Command (⌘) + R keys. 
  3. Maintain the keys till the Apple brand seems on the display. 
  4. Launch the keys, and your Mac will boot into macOS Restoration Mode
  5. Click on on Utilities on the menu bar. 
  6. Open Terminal from the drop-down menu. 
  7. If in case you have an lively web connection, enter the next command to replace the time and date settings robotically. 
    ntpdate -u
  8. Should you don’t have an lively web connection, kind the next command to manually change the date and time: date [mm][dd][HH][MM][yyyy]
  9. Be aware that you could enter the above command (month, day, hour, minutes, and at last the 12 months) with none areas. 
    date 0518171215
  10. Exit the Terminal
  11. Strive the installer to see if the issue has been solved or not!

2. Use macOS Restoration

If the above answer didn’t repair the “An Error Occurred Whereas Making ready the Set up” error in your Mac, you should utilize the built-in macOS Restoration.

Command (⌘) + R keys will boot your Mac into Restoration Mode, with completely different key combos to completely different variations of macOS.

There’s a checklist of varied mixture keys, and you may decide the one which works greatest for you. It’s fairly easy; observe the steps outlined under:

  1. Flip off your Mac.
  2. Activate your Mac utilizing one of many following key combos:
    1. Command (⌘) + R: reinstall the newest macOS model that was put in in your Mac. 
    2. Choice + Command (⌘) + R: replace your Mac to the newest appropriate macOS model.
    3. Shift + Choice + Command (⌘) + R: set up the model that got here together with your Mac system.
  3. Click on Reinstall macOS to proceed the set up course of. 

3. Re-Obtain the Installer

If not one of the above options labored, there is likely to be an issue with the installer you’re utilizing, which could be corrupted or damaged.

On this case, you may obtain the installer once more, and often, the issue will likely be solved. Earlier than downloading the installer, delete the earlier one out of your Mac. Then proceed with the obtain. 

4. Reinstall the OS With out Erasing the Drive

Typically, you could erase the drive earlier than reinstalling the OS. To do that:

  1. Flip off and in your Mac and press and maintain Command (⌘) + R.
  2. Launch the keys as well into Protected Mode and open the Utility menu.
  3. Choose Disk Utility and click on Proceed.
  4. Choose the disk, which is Macintosh HD for many customers.
  5. Click on on the First Assist choice.
  6. Look forward to a few minutes till the Accomplished button prompts. Click on on it. 
  7. Exit Disk Utility, return to Utility Menu, and choose Reinstall OS.

5. Reinstall the OS After Erasing the Drive

If reinstalling the OS gained’t work, strive erasing the drive first after which proceed the method. 

  1. Restart your Mac, and press and maintain Command (⌘) + R.
  2. Choose a consumer you might have the password for and enter the administrator password (if requested).
  3. Select Disk Utility and hit Proceed. 
  4. Choose Macintosh HD and click on on the Erase tab. 
  5. Choose the format kind to Mac OS Prolonged (Journaled) or APFS (as advisable by Disk Utility).
  6. Should you see an Erase Quantity Group button, click on that button as a substitute of Erase
  7. Give up Disk Utility and return to the Utility window.
  8. Choose Reinastall macOS.

6. Recreate Your Fusion Drive and Add a New Quantity 

In case your MacBook has a Fusion Drive, use this method. A Fusion Drive is made up of two separate drives which have been fused. That is sometimes a hybrid of a Serial ATA drive (HDD) and an SSD.

To repair the “An Error Occurred Whereas Making ready the Set up” error in your Mac, you’ll have to erase and reformat the disk utilizing the Disk Utility and the macOS Prolonged (Journaled) choice. After that, observe the steps under:

  1. Use the Utility menu and launch Terminal.
  2. Test your drive Unix names by operating the command under:
    diskutil checklist inner 
  3. It’s essential to notice which one is the HDD and which one is the SSD. For many customers, the HDD is disk 1, and the SSD is disk0.
  4. Now, run the command under to force-unmount the logical quantity:
    diskutil unmount power disk2s1 
  5. Reformat your drives by operating the next instructions:
    diskutil eraseDisk JHFS+ SSD disk0
    diskutil eraseDisk JHFS+ HDD disk1
  6. Run the command under to recreate the disk:
    diskutil cs create “Macintosh HD” disk0 disk1
  7. Create a logical quantity on the disk with the command under:
    diskutil cs createVolume “Macintosh HD” JHFS+ “Macintosh HD” 100%
  8. Exit Terminal and reinstall macOS.

7. Contact Apple Help

If not one of the abovementioned options labored for you, it might imply that you’ve got a tough disk subject. In that case, you’ll have to contact Apple Help for assist.

In case your Mac has an HDD, you could substitute it. Take your MacBook to the closest Apple Retailer, and they’ll restore or substitute it for you. 


To summarize, in case your MacBook says that an error occurred whereas getting ready the set up, here’s what you are able to do:

  • Click on on Utilities, then Terminal.
  • If in case you have an web connection, enter the next command and hit enter: ntpdate -u This can robotically replace the date and time in your MacBook.
  • If in case you have no Web connection, then enter these instructions: date mmddHHMMyyyy.
  • For instance, if it’s presently 8:25 pm, July 17, 2022, the command would look one thing like this: “date 0717082522”. So enter: date 0717202522 into the terminal and hit enter.
  • Ensure that the time and date are right, then exit the terminal and attempt to reinstall the OS X.

If the error doesn’t disappear, it’s best to strive erasing the drive and reinstalling the macOS. If nothing labored, take your MacBook to Apple Retailer and allow them to repair the issue. 

Let me know if this helped repair “An Error Occurred Whereas Making ready the Set up”. Should you discovered success doing one thing else, go away a remark down under!

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