![[FIXED] An error occurred while preparing the installation! macOS Sierra Recovery Error! @Mr.Macintosh](https://i.ytimg.com/vi/Z9pK75VPJC0/maxresdefault.jpg)
Uploaded January 2024 | Updated September 2026, 2 weeks ago
Are you trying to install macOS Sierra from recovery or internet recovery and getting the error "An error occurred while preparing the installation. Try running this application again" ? I will show you 3 ways to fix the issue. NOTE: THIS IS A NEW ISSUE & NOT THE DATE & TIME OR CERT ISSUE! CHAPTERS BELOW
Instructions download URL
curl -L archive.org/download/sierraurl/sierra.txt
Youtube keeps cutting off the url, I've added spaces below so you can see the url.
curl -L https:// archive.org / download / sierraurl / sierra.txt
If above command still does not show properly, visit my website fix link below
Main article link on now to fix the macOS Sierra Recovery & Internet Recovery
mrmacintosh.com/fixed-an-error-occurred-while-preparing-the-installation-macos-sierra-recovery-error
0:00 Welcome and intro
0:30 MrMacintosh.com Article link
0:40 That is the root problem of this issue?
1:53 Quick review of the 3 different ways to fix this issue
2:07 Fix Option #1 Boot to a newer version of macOS Internet Recovery
2:28 Fix Option #2 Create and boot to macOS Sierra USB Drive
3:27 Fix Option #3 Download Sierra from Apple to recovery & use it to install Sierra!
3:35 Make Sure you are connected to WIFI or Ethernet Internet
4:10 Make sure your date and time are correct in macOS terminal with the date command
5:17 Using curl to download a custom instructions txt file to follow along!
6:30 Backup your hard drive data (if needed) & Erase Macintosh HD in disk utility
8:06 Downloading Sierra InstallOS.dmg from Apple.com via curl command
9:51 Mounting the InstallOS.dmg file
10:17 Installing the InstallOS.pkg file to get access to the Install macOS Sierra app
10:47 Kicking off the macOS Sierra installer with installassistant_springboard
11:12 DONE! Walking through the fresh installer.
12:07 Thank you!
Support Mr. Macintosh
patreon.com/mrmacintosh
paypal.me/mrmacintoshblog
Links
MrMacintosh.com - Apple Mac Enterprise IT Blog & macOS News for MacAdmins
Twitter
twitter.com/ClassicII_MrMac
Are you trying to install macOS Sierra from recovery or internet recovery and getting the error "An error occurred while preparing the installation. Try running this application again" ? I will show you 3 ways to fix the issue. NOTE: THIS IS A NEW ISSUE & NOT THE DATE & TIME OR CERT ISSUE! CHAPTERS BELOW
Instructions download URL
curl -L archive.org/download/sierraurl/sierra.txt
Youtube keeps cutting off the url, I've added spaces below so you can see the url.
curl -L https:// archive.org / download / sierraurl / sierra.txt
If above command still does not show properly, visit my website fix link below
Main article link on now to fix the macOS Sierra Recovery & Internet Recovery
mrmacintosh.com/fixed-an-error-occurred-while-preparing-the-installation-macos-sierra-recovery-error
0:00 Welcome and intro
0:30 MrMacintosh.com Article link
0:40 That is the root problem of this issue?
1:53 Quick review of the 3 different ways to fix this issue
2:07 Fix Option #1 Boot to a newer version of macOS Internet Recovery
2:28 Fix Option #2 Create and boot to macOS Sierra USB Drive
3:27 Fix Option #3 Download Sierra from Apple to recovery & use it to install Sierra!
3:35 Make Sure you are connected to WIFI or Ethernet Internet
4:10 Make sure your date and time are correct in macOS terminal with the date command
5:17 Using curl to download a custom instructions txt file to follow along!
6:30 Backup your hard drive data (if needed) & Erase Macintosh HD in disk utility
8:06 Downloading Sierra InstallOS.dmg from Apple.com via curl command
9:51 Mounting the InstallOS.dmg file
10:17 Installing the InstallOS.pkg file to get access to the Install macOS Sierra app
10:47 Kicking off the macOS Sierra installer with installassistant_springboard
11:12 DONE! Walking through the fresh installer.
12:07 Thank you!
Support Mr. Macintosh
patreon.com/mrmacintosh
paypal.me/mrmacintoshblog
Links
MrMacintosh.com - Apple Mac Enterprise IT Blog & macOS News for MacAdmins
twitter.com/ClassicII_MrMac
![[FIXED] An error occurred while preparing the installation! macOS Sierra Recovery Error!](https://i.ytimg.com/vi/Z9pK75VPJC0/mqdefault.jpg "[FIXED] An error occurred while preparing the installation! macOS Sierra Recovery Error!
Are you trying to install macOS Sierra from recovery or internet recovery and getting the error An error occurred while preparing the installation. Try running this application again ? I will show you 3 ways to fix the issue. NOTE: THIS IS A NEW ISSUE & NOT THE DATE & TIME OR CERT ISSUE! CHAPTERS BELOW
Instructions download URL
curl -L https://archive.org/download/sierraurl/sierra.txt
Youtube keeps cutting off the url, Ive added spaces below so you can see the url.
curl -L https:// archive.org / download / sierraurl / sierra.txt
If above command still does not show properly, visit my website fix link below
Main article link on now to fix the macOS Sierra Recovery & Internet Recovery
https://mrmacintosh.com/fixed-an-error-occurred-while-preparing-the-installation-macos-sierra-recovery-error/
0:00 Welcome and intro
0:30 MrMacintosh.com Article link
0:40 That is the root problem of this issue?
1:53 Quick review of the 3 different ways to fix this issue
2:07 Fix Option #1 Boot to a newer version of macOS Internet Recovery
2:28 Fix Option #2 Create and boot to macOS Sierra USB Drive
3:27 Fix Option #3 Download Sierra from Apple to recovery & use it to install Sierra!
3:35 Make Sure you are connected to WIFI or Ethernet Internet
4:10 Make sure your date and time are correct in macOS terminal with the date command
5:17 Using curl to download a custom instructions txt file to follow along!
6:30 Backup your hard drive data (if needed) & Erase Macintosh HD in disk utility
8:06 Downloading Sierra InstallOS.dmg from Apple.com via curl command
9:51 Mounting the InstallOS.dmg file
10:17 Installing the InstallOS.pkg file to get access to the Install macOS Sierra app
10:47 Kicking off the macOS Sierra installer with installassistant_springboard
11:12 DONE! Walking through the fresh installer.
12:07 Thank you!
Support Mr. Macintosh
https://www.patreon.com/mrmacintosh
http://paypal.me/mrmacintoshblog
Links
https://MrMacintosh.com - Apple Mac Enterprise IT Blog & macOS News for MacAdmins
Twitter
https://twitter.com/ClassicII_MrMac")
![Install Google Chrome OS Flex on Old Macs [2009-2015] MacBook Pro!](https://i.ytimg.com/vi/_62ryY4PjYY/mqdefault.jpg "Install Google Chrome OS Flex on Old Macs [2009-2015] MacBook Pro!
Did you know that you could install Chrome OS on your old 2009-2015 unsupported Mac? This is just another option along with OpenCore Legacy Patcher + Big Sur or Monterey or Windows 10 or Windows 11 to keep your old Mac running and secure!!! This video is a step-by-step guide on how to install Chrome OS Flex on your Mac! UPDATES & CHAPTERS BELOW!
0:00 Welcome and intro
0:29 UPDATES & Chapters Section
0:44 Why would you want to install Chrome OS on a Mac?
1:25 What are the Mac Hardware Requirements for Chrome OS Flex?
1:50 What do you need to Install Google Chrome OS Flex on a Mac?
2:39 Minimum Device Requirements for Chrome OS Flex
2:53 How to create a Chrome OS Flex USB Installer
6:58 Chrome OS Flex lets you try out the OS running off the USB
7:29 Note: have a USB installer of macOS if you want to roll back to macOS
8:00 Ready to reboot the Mac to Chrome OS Installer Hold down Option key
8:22 Select EFI Boot from the boot picker menu
8:55 The Chrome OS Flex installer is booted - Get Started
9:23 Starting the Install of Chrome OS
10:17 Install is complete, the Mac must be shut down and powered back up.
10:24 Powering the Mac Back on without the Chrome OS USB installer plugged in
10:38 Now we are at the Chrome OS Setup Assistant Window + Process
11:45 Booted to Chrome OS Flex on a 2010 Mac Mini!
11:57 Checking Wifi, BlueTooth & Sound Settings
12:47 Thank you!
Google Chrome OS Flex Installation Instructions
https://support.google.com/chromeosflex/answer/11552529?hl=en&ref_topic=11551271
Google Chrome OS Certified Hardware model list for Apple
https://support.google.com/chromeosflex/answer/11513094?hl=en&ref_topic=11618314#zippy=%2Capple
Installing macOS Monterey on your Unsupported Mac
Download Full macOS Monterey & Big Sur Installers InstallAssistant.pkg - https://mrmacintosh.com/macos-12-monterey-full-installer-database-download-directly-from-apple/
Download Full macOS Monterey & Big Sur M1 Apple Silicon IPSW Files
https://mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database/
Support Mr. Macintosh
https://www.patreon.com/mrmacintosh
http://paypal.me/mrmacintoshblog
Links
https://MrMacintosh.com - Apple Mac Enterprise IT Blog & macOS News for MacAdmins
Twitter
https://twitter.com/ClassicII_MrMac
Interested in Xcode and Swift? Subscribe to the Swift Goose!
https://www.youtube.com/channel/UCeHYBwcVqOoyyNHiAf3ZrLg
Subscribe to The Apple Ninjas YouTube! If it wasnt for him, I would not even be on YouTube today. Thank you!!!
https://www.youtube.com/channel/UCRddzq1GBchvbZqnVkioKnQ")
![OpenCore Legacy Patcher 2.0.2 Update! [BIG FIXES]](https://i.ytimg.com/vi/beOvYXHVpmQ/mqdefault.jpg "OpenCore Legacy Patcher 2.0.2 Update! [BIG FIXES]
OpenCore Legacy Patcher 2.0.2 Update is live and includes some big fixes for macOS Sequoia! In this video Ill go over all the changes & fixes in this update along with testing 13 different Mac Models!. The OCLP 2.0.2 update supports Big Sur 11.7.10, Monterey 12.7.6, Ventura 13.7 & Sonoma 14.57 & Sequoia 15.0.
Hurricane Helene Disaster Relief Donations
https://www.usatoday.com/story/news/nation/2024/09/28/how-to-help-hurricane-helene/75431425007/
OpenCore Legacy Patcher website
https://dortania.github.io/OpenCore-Legacy-Patcher/
OpenCore Legacy Patcher 2.0.2 App download
https://github.com/dortania/OpenCore-Legacy-Patcher/releases
Support the OCLP Devs at Open Collective
https://opencollective.com/opencore-legacy-patcher
my OCLP Sequoia on Unsupported Macs full walkthrough video
https://youtu.be/rfa2aSm7OxQ
My OCLP Sonoma on Unsupported Macs full walkthrough video
https://youtu.be/eGR2qGw9lG8
Download the latest macOS Ventura Kernel Debug Kit (KDK)
https://github.com/dortania/KdkSupportPkg/releases
USB-A USB 2.0 HUB (My Amazon Affiliates link)
https://a.co/d/i7yNkXq
I want to thank both Mykola Grymalyuk (khronokernel) & Dhinak G (dhinakg) for your work on OpenCore Legacy Patcher + all of the contributing developers that help maintain the patcher! OCLP brings new life to thousands of Macs by saving them from the recycler!
SUPPORTED MAC MODELS LIST
https://dortania.github.io/OpenCore-Legacy-Patcher/MODELS.html
Having a issue? - OpenCore Legacy Support + Discord Server
https://discord.gg/rqdPgH8xSN
Support Mr. Macintosh
https://www.patreon.com/mrmacintosh
http://paypal.me/mrmacintoshblog")
