Whenever there is a new macOS available, the need to reinstall macOS will surge. When you update or reinstall the macOS, the last thing you want is probably losing data on your computer. To reinstall macOS, including the latest Catalina, Mojave, without losing data, you can follow the professional guide to update the OS, which will not cause data loss in most of the case. If you still have worries, back up your Mac in advance or recover the lost files with EaseUS Data Recovery Wizard.
This page covers the full process of how to update and install the latest macOS Catalina, Mojave, etc. on Mac without losing any data. If you need a detailed guide, follow through this page to get the desired macOS installed on your computer now:
Applies To: macOS Catalina, macOS Mojave, macOS High Sierra, macOS Sierra, or earlier Mac operating systems
The need to update or reinstall your macOS always follow the release of a new operating system, the slow performance of your Mac, or a system crash. When it comes to reinstalling macOS, users biggest concern is losing data on their computer.
The good news is that, if you follow the instructions strictly to update your Mac Operating System, the chance to lose data on your Mac is quite slim, since a reinstallation just needs to create a new copy of the OS, your existing files stored on your Mac won't be lost. Thus, as long as you don't choose to erase your startup disk during the reinstallation, you won't lose files. However, you know what 'Slim' means - it's not 100% safe and is still at the risk of losing some data.
Then how to reinstall macOS without any data loss? To provide a double guarantee to the precious data on your Mac, you can make a copy of the files on your Mac before you perform the reinstallation, or equip your Mac with a data recovery tool that can rescue your data after the reinstallation. Excel download not showing correctly on a macbook air.
This will reinstall OS X 10.7.0; assuming it is successful, you will still need to update to OS X 10.7.1, or whatever newer version is out at the time. Finally, restore your remaining data. The OS X Utilities window appears. Select Reinstall OS X, and click Continue. The OS X Yosemite splash screen appears. A sheet appears informing you that your computer’s eligibility needs to be verified by Apple. Click Continue to begin the process of installing or reinstalling OS X. Message To download and restore OS X, your computer's eligibility will be verified with Apple when installing older versions of Mac OS X for me every time meant only one: The certificate which is being used in the OS has expired. This will be correct for every OS later in the future (Sierra, High Sierra, etc). I was attempting to wipe my computer clean to start over as I’m giving it to my girlfriend. When I try to reinstall Mac OS Sierra it says “to download and restore MacOS, your computers eligibility will be verified with Apple” — I hit continue and nothing happens. Can I download MacOS without internet? Hi, This morning I decided to factory reset my macbook pro via Internet recovery (command-opt-r security options erase). How to download ebook from amazon to mac computer. And when I tried to reinstall the OS X, I get to the 'to download and restore OS X, your computer's eligibility will be verified with Apple' part, click continue, and the colourful spinning wheel would come up before I get the 'request timed out' message.
Preparations you Need to Make Before You Reinstall macOS
To reinstall macOS on your computer smoothly. Follow the tips below to prepare your Mac ready for the new macOS update now:
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Remember to back up your Mac to an external hard drive for preventing system update failure or unexpected troubles from happening. Then follow the detailed guide below to reinstall Mac OS via macOS Recovery mode, which enables you to reinstall macOS, restore your files from Time Machine, repair or erase a disk, and more.
How to Update & Reinstall macOS Without Losing Data
*Print this page or open this page on another device so you can refer to it later.
Step 1. Start up your Mac from macOS Recovery
Step 2. Select 'Reinstall macOS' from the Utilities Window and click 'Continue'.
Step 3. Follow the onscreen instructions to select the hard drive you want to install the OS on and start the installation.
Step 4. Don't put your Mac to sleep mode or close its lid during the installation. It's normal to see your Mac restart several times or the screen is white while you reinstall the Mac OS. How to increase utorrent download speed on mac. Just wait patiently for the process to finish.
If data loss occurred after you reinstalled macOS, you can follow the next part to recover your missing files.
Recover Lost Data After macOS Reinstallation
If you have backed up your Mac before the reinstallation, you can retrieve your data from Time Machine, an external hard drive, or somewhere else, depending on the way you used to make the backup. If you haven't created any backups for your Mac, then you'll need the professional Mac data recovery software tool - EaseUS Data Recovery Wizard, to perform data recovery. With the help of this tool, you can easily recover the data lost due to macOS reinstallation:
Step 1. Select the disk location (it can be an internal HDD/SSD or a removable storage device) where you lost data and files. Click the 'Scan' button.
Step 2. EaseUS Data Recovery Wizard for Mac will immediately scan your selected disk volume and display the scanning results on the left pane.
To Download And Restore Macos Your Computer's Eligibility
Step 3. In the scan results, select the file(s) and click the 'Recover Now' button to have them back.
There are lots of data recovery tools available. But EaseUS Data Recovery Wizard, one of the best Mac data recovery tools, is our pick. It fully supports all macOS systems including the newest Catalina, Mojave, High Sierra, Sierra, EI Capitan, Yosemite etc. It allows you to restore all lost data with simple clicks. Office files, music, videos, emails or other archives can all be restored on your own.
My MacBook Pro was having trouble restarting (doesn't go past the grey screen with apple logo) so I tried to reinstall lion. However I will not advance past the verify computer elegibility screen. I let it sit like that for several hours and nothing. I originally bought my mac in August 2011 originally with snow leopard but had a free upgrade to lion. I don't have the original disk, it is not with me. Has anybody else had this issue? Or have any ideas on how to fix it?
![]() To Download And Restore Macos Your Computer's Eligibility Loading Installation Information
MacBook Pro, Mac OS X (10.7)
To Download And Restore Macos Your Computer's Eligibility Stuck
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December 2020
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