Feb 08, 2019 Last Wednesday he installed an update of macOS. Yesterday morning during startup he got the message 'MacOS Installation Could not be completed' Then he restarted the iMac several times. The above message came back every time. Then he turned off the iMac. After turning on the iMac, he pressed the CMD + R key and chose 'Reinstall macOS'. Safe mode startup succeeded but the next time the (normal) boot ended as before, with the infamous “couldn’t complete” message. I followed Luis’ hint then. Actually on my High Sierra macbook it was clicking “apple logo - startup disk” and then just confirming already. Oct 09, 2019 Check macOS Catalina Compatibility. MacOS Catalina is available on 2012 and later models on the MacBook Air, MacBook Pro, iMac and Mac mini. MacBook models that are 2015 or later will also be able to update to macOS Catalina.
This short article explains what you can do when you encounter the “The macOS installation couldn’t be completed” error message.
The error message says:
“If you continue having a problem installing macOS, the installation log may help you diagnose the problem. To save the log, click Save log. To start installing macOS again, click Restart. To start up your computer using a different disk, choose Startup Disk from the Utilities menu.” See the image below:
The error message has four options: Shut Down, Restart, Save Log and View Log. It is highly likely that restarting your computer will produce the same error message.
Updating your Mac is usually very simple process. However, in some cases, you may encounter errors like this one. Please note that it has been reported that this issue may occur even when no upgrade or update is initiated. Your Mac stuck in the middle of a macOS update and your Mac will not start up? Here is how you can fix it:
Note that before trying anything, you may want to backup your device.
Fix:
The first thing you should try is to start your Mac in safe mode. You can do so easily: Simply restart your computer and as soon as your computer begins restarting, press and hold the Shift key, until you see the Apple logo. This will put your computer in safe more. Try to update or upgrade your Mac now. If this does not work, read on.
The next thing you should try is to start up your Mac using Startup Manager. Here is how:
If you are still having this issue, try repairing your disk. Here is how:
If nothing above helps, follow the steps below:
If you are still having problems try this.
'macOS 10.13 High Sierra is now available for update on Mac computers and can anyone of you tell me some tips that can help me smoothly update my MacBook Pro into latest macOS High Sierra without losing any data or meet any problems? Thank you.'
Mac Won't Install Software Update
If you are trying to find a simple way to update Mac OS to the latest 10.13 or 10.13.4 High Sierra or you are looking for effective solutions to fix macOS High Sierra update stuck or failure error, you are at the right place. Follow the two next parts to free download macOS 10.13/10.13.4 to install and fix the macOS High Sierra update error right now.
Part 1. Upgrade to macOS 10.13/10.13.4 High Sierra without losing data
Here Part 1, we'll show you how to upgrade to macOS 10.13/10.13.4 High Sierra without losing any data on MacBook Pro/MacBook Air/iMac etc.
Step 1. Back up Mac computer data before macOS 10.13/10.13.4 update
Here you have two options to backup Mac data before macOS 10.13/10.13.4 update: Time Machine or Mac backup software for help.
Option 1. Back up Mac data with Time Machine
Option 2. Backup Mac data with Mac backup software
EaseUS Todo Backup for Mac supports backing up your Mac data in 3 steps:
1. Download, install and launch EaseUS Todo Backup for Mac.
Click the first Backup tab or simply click the plus (+) button at the left corner of the left pane to create a backup project -- name the backup project and click OK.
2. Set up the backup destination where you want to store Mac files as backups, automatic backup frequency and click OK.
3. Add files and folders to the backup project.
Click File+ to selectively choose files and folders to back up and click the blue start button to back up your Mac data to another drive or external device. Step 2. Download and install macOS 10.13/10.13.4 High Sierra
1. Go to the Apple store > Find macOS 10.13.10.13.4 update.
2. Click Download and fill in your Apple ID when asked. 3. After you download the macOS 10.13/10.13.4 upgrade software, install the software and update Mac computer to macOS 10.13 or 10.13.4 High Sierra by following the onscreen instructions. If no update problems occur, restart your Mac computer and enjoy the new macOS on your device. If you get stuck or cannot install macOS 10.13 on your device, just follow Part 2 to get the problems solved and fixed on your own. Part 2. Fix macOS 10.13/10.13.4 High Sierra update stuck/failure or freeze error
If you cannot download or install macOS 10.13 update on your Mac, or macOS 10.13/10.13.4 gets stuck, freezes or fails to install, don't panic and just simply follow these instructions.
Fix 1. macOS Sierra 10.13/10.13.4 downloaded but won't install![]()
If you get stuck or fail to install the downloaded macOS 10.13/10.13.4, try the tips below to get this problem fixed:
Fix 2. macOS 10.13/10.13.4 High Sierra fails to install/gets stuck or freezes while installing
Here you have two options to fix the macOS 10.13/10.13.4 installation failure error:
Mac Software Update Couldn't Be Completed Mac Error Messages
Option 1. Install macOS update in Safe Mode to fix the macOS High Sierra 10.13/10.13.4 update stuck error
If you cannot install macOS 10.13/10.13.4 in Safe Mode, try a clean installation of the new update.
Option 2. Clean installation of macOS Sierra 10.13/10.13.4 to fix macOS fails to install issue
To complete a clean installation of macOS Sierra 10.13/10.13.4 on Mac, you may need to do some pre-installation preparation:
Step 1. Create a bootable installer
Mac Software Update Won't Download
Step 2. Clean installation of macOS 10.13/10.13.4 update
Extra Tip: Restore lost data due to the macOS 10.13/10.13.4 High Sierra updateMac Update Won't Install
If you forgot to create backups for your Mac data before the macOS 10.13/10.13.4 update, you still have a chance to restore lost data due to the update.
Mac Won't Update Os
Professional Mac data recovery software - EaseUS Data Recovery Wizard for Mac with Bootable Media allows you to restore all lost data due to a macOS update or for other reasons.
1. Click the tutorial page about how to create bootable media for Mac.
2. Boot your Mac from EaseUS Data Recovery Wizard for Mac Bootable Media. 3. Launch EaseUS Data Recovery Wizard for Mac and select the file types of lost data. Click Next. 4. Choose the volume where the data was lost, click Scan to let the program scan the lost data for you. Choose Deep Scan and let the program find more lost data for you on your Mac.
Important Note -- if your Mac hard drive uses an APFS file system, you can only use the deep scan option to scan and find all lost data on the drive
Mac Software Update Error
5. Preview and choose the found hard drive data, then click Recover to save it in a safe spot on your Mac.
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