An Error Occurred While Preparing the Installation Try Running the Application Again Lion
Updating your Mac takes long enough as information technology is. But that ordeal becomes fifty-fifty more time-consuming when the update fails and an error bulletin says "macOS could not be installed on your reckoner."
Don't lose hope. Nigh of the time, y'all can fix this error using the troubleshooting steps below. It shouldn't have long to work your way through them. We'll fifty-fifty explicate how to avoid these kinds of macOS installation errors in the time to come.
Why macOS Couldn't Be Installed on Your Computer
At that place are a lot of different reasons why an error might occur while installing a macOS update. Hopefully, the error message told y'all exactly what the problem is. That mode, you lot know where to target your troubleshooting efforts.
Some of the almost common reasons macOS can't consummate the installation include:
- The path /System/Installation/Packages/OSInstall.mpkg appears to exist missing or damaged
- Not enough free storage on your Mac
- Corruptions in the macOS installer file
- Problems with your Mac's startup disk
- Incompatible hardware
Whatever the cause of your macOS installation fault, it's usually easy to fix for yourself. Follow the tips below to sort out the consequence.
Earlier Troubleshooting Your macOS Installation Mistake
If your macOS installation couldn't exist completed, yous might find yourself stuck in a loop where the installer reopens every time you lot restart your reckoner. Follow these quick steps to interruption out of that loop and protect your data before troubleshooting the fault.
Step 1. Boot Up Your Mac in Condom Mode
Rubber Mode stops various programs from launching upon startup, including the macOS installer. Booting your Mac in Safe Mode breaks yous out of any startup loops and stops troublesome programs from running in the background.
The instructions for using Safe Style vary depending on whether you have an Intel or Apple silicon chip in your Mac.
To boot into Safe Mode on an Intel-based reckoner, restart your Mac and hold down the Shift key while it powers on. Release the fundamental when y'all encounter the Apple tree logo or hear a startup audio. It should say Safe Boot in the bill of fare bar on the login screen.
On an Apple silicon estimator, shut downward your Mac, then press and hold the Power button until the startup options screen appears. From hither, select your Startup Disk, concur the Shift key, so click Continue in Condom Way.
Stride 2. Create a New Backup Using Fourth dimension Automobile
It's ever of import to back up your Mac earlier installing a major macOS update. These updates edit the cadre files in your operating system, so if something goes wrong you might need to completely erase your Mac to prepare it.
Connect an external drive and use Time Machine to back up your Mac. Fourth dimension Machine is the simplest fashion to protect all your data in incremental backups. These allow y'all to restore files from detail dates instead of keeping only the latest version of everything.
Step iii. Check Your Mac'southward Compatibility in the App Store
Before getting started with our troubleshooting tips, take a moment to make sure the latest version of macOS is compatible with your Mac.
Visit this folio on Apple's back up website and click the link for the macOS version you want to install to view its hardware requirements. Click the Apple logo in the menu bar and select Almost This Mac to compare those requirements to your Mac.
If your Mac isn't uniform, you tin can't install that macOS version upgrade. It might be the first of many signs that it'south time to supercede your Mac.
What to Do When the macOS Installation Couldn't Be Completed
Now that you've backed upward your Mac and made certain it'southward compatible with the latest version of macOS, it's time to try fixing your installation error with the troubleshooting tips below.
Since there are then many potential causes to this macOS mistake, any ane of these suggestions might fix the problem. Nosotros'll start with the quickest and easiest tips to salve you every bit much time equally possible.
one. Restart Your Mac and Retry the Installation
Sometimes, all you need to practise to prepare macOS errors is to restart your Mac and attempt once more. Open the Apple menu and select Restart from the dropdown menu to do so.
If your Mac is unresponsive, press and hold the Ability button to force a shutdown. Don't do this while the installation is in progress, though, since doing and then can corrupt the files in your operating organization.
2. Set Your Mac to the Correct Date and Fourth dimension
It's possible that the date or fourth dimension on your Mac is wrong. When this is the case, it tin can lead to problems connecting to Apple's servers, which might be the reason there was an error installing macOS.
Open the System Preferences and go to Date & Fourth dimension to right it. Click the Padlock and enter your administrator password, so choose to Set engagement and time automatically.
three. Create Enough Complimentary Infinite for macOS to Install
A typical macOS installer takes upwards around iv–5GB of space on your Mac. But to consummate a macOS installation, your estimator actually needs virtually 20GB of free storage.
This is because the macOS installer needs extra space to unpack files and folders. Without that boosted free space, the installer has no room to work and can't complete the installation on your Mac.
Open the Apple menu and go to About This Mac > Storage to view the free space on your Mac. Click Manage Storage to see what's using the most space and then follow our tips to gratis upwardly more storage on your Mac.
4. Download a New Re-create of the macOS Installer
The macOS installer on your Mac may have go corrupt somehow. Information technology's a good idea to move that installer to the Trash and download a new one to replace it.
Most older macOS installers are available directly from Apple tree'due south support website, which gives you the full combo installer, rather than the smaller version available through System Preferences or the App Store. Even so, you lot may need to download the installer from the App Store for newer versions, like macOS Monterey.
v. Reset the PRAM and NVRAM
The PRAM and NVRAM store various settings and preferences on your Mac, such as your screen brightness, sound volume, and display resolution. Errors with your PRAM or NVRAM might explain why macOS couldn't be installed on your figurer.
Fortunately, it'south easy to reset these settings without erasing whatsoever of your personal data. To practise and then, restart your Mac and agree Pick + Cmd + P + R while it powers on.
Keep property all those keys until you see a second Apple tree logo or hear a second startup audio, at which point the reset is complete.
6. Run Offset Aid on Your Startup Disk
All the same seeing that the macOS installation couldn't be completed? There might be deejay permission or fragmentation errors on your startup disk. It's easy to set up most of these kinds of errors using the Disk Utility app, which comes pre-installed on macOS.
Open Deejay Utility from the Utilities folder in Applications. Select your Mac'due south startup disk in the sidebar—usually called Macintosh Hard disk drive—then click Starting time Aid. When you Run Commencement Aid, Disk Utility scans your disk for errors and repairs whatever it can.
If you tin't access Disk Utility unremarkably, kicking into macOS Recovery using the instructions below and try to run First Aid again.
vii. Use macOS Recovery to Reinstall macOS
If macOS even so won't install properly, you might need to reinstall the whole operating system instead. You lot can do this using macOS Recovery on your Mac.
The process for booting into macOS Recovery is a dissimilar for Intel and Apple silicon Macs.
On an Intel Mac, restart your Mac and concord Option + Cmd + R while information technology powers on. Release the keys when you encounter an Apple logo or hear a startup sound, at which point a macOS Utilities window appears.
On an Apple silicon Mac, shut it down, then press and agree the Ability button until the startup options screen appears. Click Options, then click Continue.
In one case in macOS Recovery, click Reinstall macOS to install the latest version of macOS. This might take a while, since your Mac needs to download the new software first.
8. Erase Your Mac and Restore From a Backup
The last troubleshooting solution for whatsoever software-related problem is to erase your startup disk and reinstall macOS from scratch. With a new version of macOS on your computer, you lot can then restore all your data from a Time Machine backup.
If you don't back up your Mac before you erase the startup disk, you will lose all your data: photos, music, files, and everything else.
Follow these instructions to erase and restore your Mac.
Use Mac Utilities to Avoid Future macOS Errors
Equally y'all've seen, there are several reasons an fault message might say macOS could not be installed on your computer. We've shown you lot how to troubleshoot these problems, but you have a better chance avoiding them if you keep your Mac in tip-top shape all the time.
Lots of free apps offer to gratis upwards more storage or remove malware to aid you practice this.
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