[Solved] An Error Occurred While Preparing the Installation?
When you are attempting to install the macOS, it’s possible to encounter the “an error occurred while preparing the installation” issue. Do you know how to solve it? Well, in this post, MiniTool Partition Wizard introduces several effective solutions to this issue. You can have a try.
During the process of installing or updating the macOS, you may get stuck in certain issues. For instance, you are likely to fail to start the macOS installation randomly due to the error message: an error occurred while preparing the installation. Try running this application again.
The above error is mainly caused by the incorrect date & time or a corrupted installer. Besides, temporary glitches and corrupted NVRAM data are also the reasons for the “Mac an error occurred while preparing the installation” issue. Now that we learn the possible reasons for this issue, let’s keep reading to find out the feasible methods for fixing it.
Method 1: Perform a Restart
The simplest and quickest way to fix the “an error occurred while preparing the installation try running this application again” issue is to restart your Mac. By doing this, you can repair plenty of temporary bugs and glitches on your Mac. If the error persists after restarting your computer, you should continue with other solutions.
Method 2: Correct the Date and Time
The right date and time are important when the installer tries to establish a connection with the Apple servers for the macOS installation. Once the date and time on your Mac are set improperly, you may fail to continue the installation and receive the error message “an error occurred while preparing the installation. Try running this application again”.
In this case, to get rid of this annoying issue and complete the installation successfully, you have to correct the date and time.
Step 1: Open the Apple menu and select System Preferences. Then go to Date & Time > Date & Time.
Step 2: In the next window, uncheck the Set date and time automatically option. Then enter the correct date and time manually.
Step 3: Once you set the date and time correctly, click Save to confirm the changes.
Method 3: Reset NVRAM
As mentioned earlier, the corrupted NVRAM data may also lead to the “an error occurred while preparing the installation try running this application again” issue. To fix this issue, it’s recommended that you reset NVRAM. If you have no clue how to perform this operation, you can read this post: What Is NVRAM And How To Reset NVRAM On Mac
Method 4: Boot into Safe Mode
In this way, your Mac will boot only with the necessary macOS services, letting you avoid third-party software conflicts. Therefore, you can try booting your Mac into Safe Mode to bypass the “Mac an error occurred while preparing the installation” issue as well. Here’s a full guide for executing the way: How to Boot Mac in Safe Mode | Fix Mac Won’t Start in Safe Mode
Method 5: Use macOS Recovery
You can also try to fix the “an error occurred while preparing the installation try running this application again” issue by using the macOS recovery mode.
Step 1: Click the Apple icon at the top-left corner of your Mac desktop. Then select Restart.
Step 2: After that, immediately press and hold Command + R until you see an Apple logo or spinning globe.
Step 3: Once you enter the macOS Utilities window, highlight Reinstall macOS and click Continue. Then follow the on-screen instructions to finish the process.
Method 6: Erase Your Drive
Another way you can try to fix the “Mac an error occurred while preparing the installation” issue is to erase your drive. To do this, follow the steps below.
Note:
This way will delete all the data on the drive. To avoid data loss, you need to make a backup in advance.
Step 1: Enter the recovery mode and then select Disk Utility in the macOS Utilities window.
Step 2: Select the drive you want to use for the macOS installation. Then click Erase to continue.
Step 3: In the prompted window, set Format as Mac OS Extended (Journaled) and Scheme as GUID Partition Map. After that, click Erase to delete this drive.
Step 4: Go back to the macOS Utilities window and select Reinstall macOS to see if the error is resolved.
Method 7: Re-download the Installer
If the installer you are using to install or update the macOS is damaged, you may experience the “Mac an error occurred while preparing the installation” issue. On this occasion, you ought to download the installer again from Apple’s official website and try installing the macOS to see if the error is removed.
All the methods offered in this post are available. When you get stuck in the “Mac an error occurred while preparing the installation” issue, you can try them one by one until you fix this issue. If you have any problems with this issue, you can leave a message in the comment part below.
About The Author
Yamila is a fan of computer science. She can solve many common issues for computer users by writing articles with simple and clear words. The very aspect that she is good at is partition management including create partition, format partition, copy disk and so on. When she is free, she enjoys reading, doing some excerpts, listening to music and playing games.
How to Fix ‘An Error Occurred While Preparing the Installation’ Error [macOS Upgrade Issue]
An Error Occurred While Preparing the Installation Overview
One of the most common errors you can encounter while installing a macOS base system is the «An Error Occurred While Preparing the Installation«.The error mainly occurs due to installer issues and needs to be resolved immediately.
The reasons that can lead to the «An Error Occurred While Preparing the Installation» are:
- Corrupted installer
- Incorrect time and date details on the system
However, there are several solutions you can apply to fix this issue. Read on the section below to know more!
To prevent the inconvenience of losing important data, it is recommended that you back up your important files via the EaseUS Data Recovery Wizard for Mac Pro before installing or updating macOS.
Back Up Your Mac and Never Lose Data
Back up and restore your MacBook/iMac without Time Machine, iCloud, or external hard drives.
Method 1. Restart Mac to Fix ‘An Error Occurred While Preparing the Installation’
Restarting the system is one of the simplest ways to resolve the ‘An Error Occurred While Preparing the Installation’ error. For that, press the power button, and wait for the system to shut down. Wait a moment and press the power button again to turn on the system. Or you can restart MacBook Pro or Mac with the macOS Restart option.
Method 2. Stay in a Stable Internet Environment
You might not know, but the installer requires the internet to complete the process. With the net, you can get firmware and related information that is particular to your system, and that is why you need to have a stable internet environment.
Method 3. Check the Time and Data on Your Mac
Correct time and data details are crucial for resolving the «An Error Occurred While Preparing the Installation» error. For that, take a look at the steps you need to follow:
Step 1. Click on the Apple Menu and select System Settings from the drop-down menu.
Step 2. From the left-hand bar, select General and click on Date and Time from the right-hand.
Step 3. Go ahead with the «Set date and time automatically» option.
Step 4. Opt for the region you are in from the drop-down menu.
Method 4. Try to Install macOS in Mac Safe Mode
Mac Safe Mode is one of the most advanced properties of Apple tech. With this mode, only the vital components of the system are run. In that case, third-party apps are unavailable, eliminating any chance of contributing to that error.
Here are the steps you need to adopt:
Step 1. Turn off the system and start it again.
Step 2. Now, press and hold the Shift key till you come across the Apple logo. Log in.
Step 3. Your system will enter Safe Mode. Now, you can install macOS Monterey or other versions.
Note: Click the link to learn more if you can’t install macOS Ventura.
Method 5. Use a macOS Combo Update to Fix the Installation Error
Did you know you can fix the installation error using a combo update? With this combo update, you can update the system with the major release within the previous macOS version. These combo updates are available on the official website of Apple. Remember that these files are huge and need a stable and fast internet connection.
Method 6. Reinstall macOS in Mac Recovery Mode
You can also use the Mac Recovery Mode to resolve the installation error. Check out the steps:
Step 1. Turn off the system. Turn it on and press Option-⌘-R keys/Shift-Option-⌘-R/Command (⌘)-R immediately.
Step 2. Now, select Reinstall macOS. Click on Continue.
Note: Shift-Option-⌘-R combination keys are used when you want the original macOS version. Option-⌘-R keys combination is used to get the latest compatible Mac version. You can reinstall the previous macOS with Command (⌘)-R keys.
Method 7. Factory Reset Mac and Reinstall macOS
You can also try to factory reset Mac without password in the Recovery Mode and reinstall the OS to see if the issue is resolved. Or you can erase all content and settings on your Mac to factory reset it. For that, you must follow these steps:
Step 1. Use Erase Assistant to erase the system. (Only macOS Monterey and later versions can use this option.)
Step 2. Follow the prompt to erase your Mac step by step. Now, click «Continue».
Step 3. Select Options. Proceed with Continue. Follow the instructions given on the screen.
Step 4. Opt for Reinstall for your macOS release from the Recovery app window. Select Continue. Follow the instructions given.
Note: The steps may vary based on the Mac model you have.
Method 8. Contact Apple Support
You can always rely on the Apple support team if nothing else works. Visit the Apple Support store nearby to resolve the issue immediately.
Restore Lost Data After Fixing ‘An Error Occurred While Preparing the Installation’
Have you lost data while trying to fix the «An Error Occurred While Preparing The Installation» problem? In that case, don’t panic! Instead, install the best data recovery software — EaseUS Data Recovery Wizard for Mac. Irrespective of the cause of data loss, you can quickly restore it.
Here are some highlights of this recovery program:
- EaseUS Mac recovery program is an efficient and user-friendly software explicitly made to aid data retrieval. Eves a new Mac user can operate it without any difficulties.
- Mac users can quickly recover deleted files Mac from various data types, such as emails, documents, photos, and videos.
- You can also get back data from different Mac-based devices like memory cards, fusion drives, HDDs, etc. Also, it supports SSD Trim data recovery.
Here are the easy-to-implement steps you need to follow to use this tool:
Step 1. Search for lost files
Select the disk location to search for lost files (it can be an internal HDD/SSD or a removable storage device) on macOS Sierra, High Sierra, Mojave, Catalina, Big Sur, Monterey, Ventura, and the latest Sonoma. Click the «Search for lost files» button.
Note: Before data recovery, you’d better click «Disk Backup» from the left sidebar to create a backup of your Mac to avoid further data loss. After backing up, the software can recover data from the Mac backup, and your computer can wirte new data again.
Step 2. Go through the scanning results
EaseUS Data Recovery Wizard for Mac will immediately scan your selected disk volume and display the scanning results.
Step 3. Select the file(s) and recover
In the scan results, select the file(s) to preview and click the «Recover» button to have them back.
Bottom Line
The «An Error Occurred While Preparing the Installation» is a common error most Mac users often encounter. Luckily, there are various solutions one can adopt. For instance, you can reinstall the macOS via Recovery Mode or choose the combo update.
Regardless of the precaution you adopt, data loss is a possibility. In that case, you must choose a professional data recovery tool. Install EaseUS Data Recovery Wizard for Mac and take advantage of the beneficial features.
Try this exciting data recovery software today!
An Error Occurred While Preparing the Installation FAQs
These are the solutions you can try to fix the «An Error Occurred While Preparing the Installation». But, to know more, take a look at the questions and answers listed below —
1. How to Fix the macOS Ventura installation failed?
To fix the macOS Ventura installation failed problem, you can check if you have storage space. Besides, you also need to assess the Firewall settings, restart the system, and see if the issue is resolved.
2. Why the ‘An Error Occurred While Preparing the Installation’ error appear on my Mac?
The «An Error Occurred While Preparing the Installation» error appears on your Mac for different reasons. These include corrupt installers and the inaccurate date and time information.
3. How to fix the ‘An Error Occurred While Preparing the Installation’ error?
Different ways exist to resolve the ‘An Error Occurred While Preparing the Installation’ error. For instance, you can install macOS in Mac safe mode. You can also check the time and date and use the combo update.
4. How to recover data after reinstalling macOS to fix ‘An Error Occurred While Preparing the Installation’?
To recover data after reinstalling macOS to fix ‘An Error Occurred While Preparing The Installation’, opt for a data recovery tool. You can choose EaseUS Data Recovery Wizard for Mac!
„An error occurred while preparing the installation”
Podczas próby zainstalowania oprogramowania Autodesk pojawia się komunikat:
Rozwiązanie
Bądź na bieżąco
Najnowsze wiadomości, wydarzenia, artykuły
Dbamy o Twoje dane, więcej w polityka prywatności
Technologie informatyczne dla projektantów.
- Oprogramowanie
- Budownictwo
- Mechanika
- Animacja i Wizualizacja
- Wdrożenia BIM
- System PDM
- Wdrożenia CAM
- AR / VR / MR
- Terminarz szkoleń
- Budownictwo
- Mechanika
- Animacja
- Inne
- Regulamin szkoleń
- Stacje robocze CAD
- Plotery HP
- Monitory
- Manipulatory 3D
- Materiały eksploatacyjne
- Serwis
- Kontakt
- O nas
- Polityka prywatności
- Promocje
- Aktualności
- Wiedza
© 2023 Procad. Wszystkie prawa zastrzeżone.
Dbamy o Twoją prywatność.
Dzięki wykorzystaniu rozwiązań takich, jak pliki cookies i pokrewne technologie oraz przetwarzaniu Twoich danych, możemy zapewnić, że wyświetlane treści lepiej odpowiedzą na Twoje potrzeby. Więcej informacji znajdziesz w Polityka prywatności.
An Error Occurred While Preparing The Installation Try Running This Application Again — MacBook Air 13
I wanted to use other Startup disks like flash drives or an external hard drive, but it seems thats not working.
A look into the log files shows these two errors
MacBook-Air osishelperd[615]: Couldn’t mount base system dmg! (error code 110)
MacBook-Air osishelperd[615]: Couldn’t mount base system dmg! (error code 110)
I have tried doing this more than 10 days but i keep getting the same errors.
Is there anyone who was able to find a solution to this problem?
Show more Less
Posted on Aug 2, 2023 11:51 PM
Me too (15) Me too Me too (15) Me too Reply
Question marked as Best reply
User level: Level 10
238,641 pointsPosted on Aug 3, 2023 10:10 AM
Have you tried this yet?
Start up from macOS Recovery
Upgrade to the latest macOS compatible with your Mac.
APFS won’t work for Sierra, Sierra needs MacOS Extended Journaled. High Sierra won’t work for APFS on earlier Macs.
What has often worked for others is to use this Restore Method instead of CMD+r keys.
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
Show more Less
Similar questions
Please, apple help me solve the problem. Instal Sierra «error 110». Bought macbook Pro 2011. Hello, I bought an used macbook Pro 8, 1 @ 2,4 Ghz (x4), 4096 MB RAM (2011) OS Build: Mac OS X 10.12.6 (16G29). Problem is that I bought it while seller runned reinstalling MacOS. But in the end of installation (100%) complete coming next error message: «An error occurred while preparing the installation. Try running this application again.» I tried to run it around 10-20 times with same and different configurations. But nothing helps. In the end of installation when Installer log says its 1.000000 = 100% Installer log giving next messages about error. «Couldn’t mount base system dmg! (error code 110) IAtool: Failed to mount outer dmg Unable to setup bles on disk What can I do about it ? Can You help me solve the problem ? Under log you can find full log text file. Jan 4 11:43:12 MacBook-Pro osinstallersetupd[539]: Skipping preflighting firmware since we’re booted into the Recovery OS Jan 4 11:43:12 MacBook-Pro osinstallersetupd[539]: Operation queue succeeded Jan 4 11:43:12 MacBook-Pro powerd[152]: Assertion Released. Type:NoIdleSleepAssertion Name:’OSInstaller Setup’ Id:0x100008005 Process:osinstallersetupd [System: DeclUser kDisp] Jan 4 11:43:12 MacBook-Pro InstallAssistant[536]: Finished operation queue Jan 4 11:43:12 MacBook-Pro osishelperd[549]: Wrote prev-lang:kbd=en:3 Jan 4 11:43:12 MacBook-Pro osishelperd[549]: Current phase is: OS Installer Jan 4 11:43:13 MacBook-Pro osishelperd[549]: mountDiskImageWithPath: /Volumes/Instal/macOS Install Data/InstallESD.dmg Jan 4 11:43:14 MacBook-Pro osishelperd[549]: Couldn’t mount base system dmg! (error code 110) Jan 4 11:43:14 MacBook-Pro osishelperd[549]: IATOOL: Failed to mount outer dmg Jan 4 11:43:14 MacBook-Pro osinstallersetupd[539]: Unable to setup bless on disk. Jan 4 11:54:26 MacBook-Pro powerd[152]: Assertion TimedOut. Type:UserIsActive Name:’com.apple.iohideventsystem.queue.tickle.4294968094.11′ Id:0x900008002 Process:hidd [System: DeclUser kDisp] Jan 4 11:54:27 MacBook-Pro powerd[152]: Display is turned off Jan 4 11:54:27 MacBook-Pro powerd[152]: Assertion Summary. Type:ExternalMedia Name:’com.apple.powermanagement.externalmediamounted’ Id:0x800008000 Process:powerd [System: No Assertions]
Internet Recovery Works, Installing OS Doesn’t Good day. I erased my Mac Air and I didn’t back-up an OS in a USB. Internet recovery works for me, but whenever I install the base OS (Sierra), it always fails (error occured). I have tried this several times. Then, I tried fixing the date since I found online that it might be why an error has been occuring, but it still doesn’t install properly. I fixed the date and installed twice, still nothing. My internet connection is stable as well. Here is what I see in my Disk Utility, if it helps. Internal >AppleAPFSMedia — Macintosh HD — Macintosh HD — Data — Preboot (unmounted) — Recovery (unmounted) — VM (unmounted) >Apple SSD SM01284G Media Disk Images >Apple disk image media — OS X Base System
Error while reinstalling macOS Sierra on MacBook Air I erased my hard drive and reinstalled the Mac OS in order to trade in my old Macbook Air. But I did the whole set up by mistake, so I deleted my hard drive again and tried to reinstall the OS (macOS Sierra) again however it always fails at the end of it and says ‘An error occurred while preparing the installation. Try running this application again.’ I have tried this maybe about 8 times now and restarted the computer as well. I changed the date and time and ran disk first aid but it still hasn’t fixed the problem. The internet recovery also shows up every time I restart.