Today’s Mac computers have a built in feature called recovery mode which allows you to start your Mac computer on a separate boot partition on your hard drive and restore from Time Machine backup, reinstall Mac OS, or use disk utility.If your Mac does not have the built in recovery mode, you can attempt to boot into recovery mode over the Internet (see below). Recovery Mode is a special mode that loads macOS’ built-in recovery tools from a special disk partition that holds a recovery image along with a copy of the macOS installer. If your Mac cannot be recovered in any other way, use Recovery Mode to diagnose disk problems, get help online or install the version of macOS that previously ran on this. Jun 01, 2017 Press Command+R as your Mac boots to access Recovery Mode. If necessary, you’ll be asked to connect to a network so your Mac can download the appropriate recovery software. You can then choose your language and use the graphical tools here. One of the nice things about a Mac is that this is all built-in. Sep 02, 2018 Before diving in, realize this is really only for advanced Mac users thoroughly comfortable with the command line environment. It’s also important to point out the hidden login Console / Terminal is completely different from Single User Mode or the Recovery Mode Terminal, which are supported on all Macs and Mac OS versions.For one, with the Console Login trick you can login directly as any.
Reinstall from macOS Recovery
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.
1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Mar 03, 2017 If yours is not a retina then it is an easy fix, go find a hard drive or ssd on amazon, new egg or a local tech store (frys, best buy, etc). Use a phillips 00 screw driver to open the macbook, you may need a T6 screw driver to transfer the drive screw mounts to the new drive. Put the new drive in and start the mac using command option R to boot into internet recovery and go from there.
Dec 18, 2018 Luckily, to avoid above condition, MacOS is equipped with an emergency repair system, which applies to Mac with OS X 10.7 or later. This emergency repair system is named as OS X Recovery Mode. Once your Mac enters the recovery mode, it can easily restore OS X without any disk installed.
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).
Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
Best virus protection for mac. Mac os x slideshow app. When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
If the installer is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
If your Mac restarts to a setup assistant, but you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might vary in some cases:
If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
Other ways to install macOS
You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.
By reinstalling macOS update, you can replace the problematic macOS with a good one easily. It is totally free to update Mac to the latest version. Most small glitches can be solved automatically.
However, there are always these or those problems during or after macOS update. Well, data loss after reinstalling macOS update is the frequently-asked question.
It is true that you can back up files with Time Machine regularly. However, it is not convenient to recover data from a Time Machine backup. During this time, you need to use Mac data recovery to make a backup and recover lost Mac files selectively and easily.
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Here you can get easy steps to fix data loss after using Recovery Mode to reinstall macOS.
Guide List
1. Will I Lose My Files If I Reinstall Mac OS
Many people have the question that “Will all previously stored files be deleted while reinstalling Mac in Recovery Mode?” The answer is “No”. It will not cause any data loss error if you reinstall macOS in Recovery Mode properly.
Only a clean install will erase your Mac with nothing left. If you want to resell or give away your Mac to others, you can erase your Mac before reinstalling the latest macOS update. You can choose Disk Utility in the Utilities window to clean install macOS if necessary.
In another word, it will not cause data loss when you reinstall macOS in Mac Recovery Mode.
If your Mac computer is corrupted or encounters other problems, you can use Mac file recovery software to get back lost data. Moreover, it is also a good way to find all hidden Mac files for backup before erasing your Mac computer thoroughly.
2. How to Recover Lost Data after Reinstalling macOS in Recovery Mode
What if you cannot find a certain file? Fortunately, you can run FoneLab Data Retriever to fix data loss after using Recovery Mode to reinstall macOS and other issues. The Mac data recovery software allows users to extract existing and deleted files from your corrupted or formatted partition.
If your deleted files have not been overwritten by new files, you can recover lost data after reinstalling macOS effortlessly.
1. Main Features of Mac Data Recovery Software
Recover photos, videos, documents, emails, music and other files on Mac selectively.
Use Quick Scan or Deep Scan mode to find your Mac file quickly.
Preview any existing and deleted file with the detailed information.
The Mac data recovery software works with Mac 10.7 or above (macOS Mojave supported).
2. How to Recover Data from Mac Hard Drive after Reinstalling
Launch Mac data recovery software after installation. Click Start under Mac Data Recovery to recover lost data under macOS reinstallation.
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Mark before the file type you want to recover. Later, select the partition that you lost data before.
Click Scan on the lower right corner to start Quick Scan. If you cannot get your lost Mac file, you can choose Deep Scan to have a second try.
Open one folder to see all recoverable Mac data. Double-click any file to get a new preview window. Then mark before files you want to recover.
Click Recover to recover lost files after reinstalling OS X on Mac. The time of Mac data recovery depends on how many files you recover.
Note:
Do not install Data Retriever on the partition you lost data before.
The destination folder should not be in the same disk that your Mac files disappeared.
After scanning, you can use the built-in Search engine or Filter function to get target files in a short time.
If you erase Mac hard disk by mistake, you can restart your Mac from a bootable USB drive. Later, you can use Data Retriever to recover lost data after using Mac Recovery mode to reinstall macOS update.
That’s all for recovering data after macOS update. You can complete the whole data recovery process in minutes. Can you get back your lost or deleted data now?
If not, just feel free to write down the main symptom of data loss after using Recovery Mode to reinstall macOS. We will help you solve the problem whenever and wherever you need.
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Preview data before recovery.
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