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If OS X El Capitan came preinstalled on your new Mac, you’ll probably never need this article until you decide to sell it. At that time, it’s a good idea to erase the disk and install a fresh copy of OS X for the next owner.
If you’re thinking about reinstalling because something has gone wrong with your Mac, know that an OS X reinstallation should be your last resort. If nothing else fixes your Mac, reinstalling OS X could well be your final option before invasive surgery (that is, trundling your Mac to a repair shop). You don’t want to reinstall OS X if something easier can correct the problem. So if you have to do a reinstallation, realize that this is more or less your last hope (this side of the dreaded screwdriver, anyway).
Sep 29, 2015 I had to get my hard drive replaced on mac book pro (2011) and now am trying to reinstall OSX Lion via internet recovery. When asked to select the disk where I want to install Mac OSX no disks are listed. Was my new hardrive installed incorrectly? MacBook Pro, OS X Mountain Lion (10.8).
In this article, you discover all you need to know to install or reinstall OS X, if you should have to.Reinstalling is a hassle because although you won’t lose the contents of your Home folder, applications you’ve installed, or the stuff in your Documents folder (unless something goes horribly wrong or you have to reformat your hard drive), you might lose the settings for some System Preferences, which means you’ll have to manually reconfigure those panes after you reinstall.
And you might have to reinstall drivers for third-party hardware such as mice, keyboards, printers, tablets, and the like. Finally, you might have to reregister or reinstall some of your software.
It’s not the end of the world, but it’s almost always inconvenient. That said, reinstalling OS X almost always corrects all but the most horrifying and malignant of problems. The process in El Capitan is (compared with root-canal work, income taxes, or previous versions of OS X) relatively painless.
How to install (or reinstall) OS X
In theory, you should have to install El Capitan only once, or never if your Mac came with El Capitan preinstalled. And in a perfect world, that would be the case. But you might find occasion to install, reinstall, or use it to upgrade, such as
- If your Mac is currently running any version of OS X except El Capitan
- If you have a catastrophic hard-drive crash that requires you to initialize (format) or replace your boot drive
- If you buy an external hard drive and want it to be capable of being your Mac’s startup disk (that is, a bootable disk)
- If you replace your internal hard drive with a larger, faster, or solid state drive
- If any essential OS X files become damaged or corrupted or are deleted or renamed
- If you sell or give away your Mac
The following instructions do triple duty: Of course they’re what you do to install OS X for the first time on a Mac or a freshly formatted hard or solid-state disk. But they’re also what you do if something really bad happens to the copy of OS X that you boot your Mac from, or if the version of OS X on your Mac is earlier than 10.10 El Capitan. In other words, these instructions describe the process for installing, reinstalling, or upgrading OS X El Capitan.
You must have Internet access to complete this procedure.
If you’ve never had El Capitan on this Mac, the first thing to do is visit the Mac App Store, download El Capitan (it’s free), and install it. Once you’ve done that, here’s how to install, reinstall, or upgrade to El Capitan, step by step:
- Boot from your Recovery HD partition by restarting your Mac while holding down the Command+R keys.The OS X Utilities window appears.
- Select Reinstall OS X, and click Continue.The OS X El Capitan splash screen appears.
- Click Continue.A sheet informing you that your computer’s eligibility needs to be verified by Apple appears.
- Click Continue to begin the process of installing or reinstalling OS X.Canon pixma ip4300 driver mac os x. If you’re not connected to the Internet, you’ll be asked to choose a Wi-Fi network from the AirPort menu in the top-right corner.The El Capitan software license agreement screen appears.
- Read the license agreement and click Agree.A sheet drops down, asking whether you agree to the terms of the license agreement.
- Click Agree again.Yes, you did just click Agree; this time you’re being asked to confirm that you indeed clicked the Agree button. If you don’t click Agree, you can’t go any farther, so I advise you to click Agree now.
- Choose the disk on which you want to reinstall OS X by clicking its icon once in the pane where you select a disk.If only one suitable disk is available, you won’t have to choose; it will be selected for you automatically.
- Click the Install button.A sheet asks for your Apple ID and password.
- Type your Apple ID and password in the appropriate fields, and click Sign In.Your El Capitan installation (or reinstallation) begins. The operating system takes 30 to 60 minutes to install, so now might be a good time to take a coffee break. When the install is finished, your Mac restarts itself.
If you were reinstalling El Capitan on the hard disk that it was originally installed on, or upgrading from Mavericks, you’re done now. Your Mac will reboot, and in a few moments you can begin using your new, freshly installed (and ideally trouble-free) copy of OS X El Capitan.
If, on the other hand, you’re installing El Capitan on a hard disk for the first time, you still have one last step to complete. After your Mac reboots, the Setup Assistant window appears.
Getting set up with the Setup Assistant
Assuming that your installation process goes well and your Mac restarts itself, the next thing you should see (and hear) is a short, colorful movie that ends by transforming into the first Setup Assistant screen (Apple Assistants such as this are like wizards in Windows, only smarter), fetchingly named Welcome.
To tiptoe through the Setup Assistant, follow these steps:
- When the Welcome screen appears, choose your country from the list by clicking it once, and then click the Continue button.If your country doesn’t appear in the list, select the Show All check box, which causes a bunch of additional countries to appear.After you click Continue, the Select Your Keyboard screen appears.
- Choose a keyboard layout from the list by clicking it once, and then click Continue.If you want to use a U.S. keyboard setup, click the U.S. listing. If you prefer a different country’s keyboard layout, select the Show All check box; a bunch of additional countries’ keyboards (as well as a pair of Dvorak keyboard layouts) appear in the list. Choose the one you prefer by clicking it — and then click Continue.The Select Your Wi-Fi Network screen appears.
- Click the name of the wireless network you use to connect to the Internet, type its password, and then click Continue.If you don’t see the network you want to use, click Rescan.If you don’t use a wireless network, click Other Network Setup, and then choose one of the available options, or choose My Computer Does Not Connect to the Internet. Click Continue.The Migration Assistant (also known as the Transfer Information to This Mac) screen appears.
- Do one of the following:
- Choose to transfer data, and then click Continue.If this is a brand-new Mac or you’re installing OS X El Capitan on a Mac and have another Mac or Time Machine backup disk nearby, you can transfer all of your important files and settings by following the onscreen instructions and connecting the new and old Macs via FireWire or Ethernet cable.Transferring data can take hours — that’s the bad news.The good news is that once the data transfer finishes, you’re finished, too. In other words, you can ignore the steps that follow (which are only for brand new installations with no data to transfer).Goodbye and good luck.
- Choose not to transfer data, and then click Continue.The Enable Location Services screen appears. Location Services allows apps such as Maps and services such as Spotlight Suggestions to gather and use data including your approximate location.
- Select (or don’t select) the Enable Location Services on this Mac check box, and then click Continue.The Sign In with Your Apple ID screen appears.
- Do one of the following:
- If you want to use your Apple ID with this Mac, type your ID (such as [email protected]) and password in the appropriate fields, and then click Continue.
- If you don’t have an Apple ID or prefer not to use one with this Mac, click Don’t Sign In, and then click Continue.To learn more about getting an Apple ID, click the blue Learn More link. In a nutshell, an Apple ID lets you make one-click purchases at the iTunes Store, iPhoto, or the Apple Store, and includes free iCloud membership.
The Terms and Conditions screen appears. - Read the Terms and Conditions and click Agree.A sheet drops down to confirm your agreement.
- Click Agree again.The Create a Computer Account screen appears.
- Do one of the following:
- If you provided your Apple ID (in Step 6), select the Use My iCloud Account to Log In check box. Then fill in the Account Name (sometimes called Short Name).
- Fill in the Full Name, Account Name (sometimes called Short Name), Password, Verify Password, and Hint fields.
This first account that you create will automatically have administrator privileges for this Mac. You can’t easily delete or change the name you choose for this account, so think it through.You can’t click the Continue button until you’ve filled in the first two fields. Because a password is optional, you can choose to leave both password fields blank if you like. If you do, your Mac warns you that without a password, your Mac won’t be secure. If that’s okay, click OK. If you change your mind and want to have a password, click Cancel. - If you want a different picture, click the little picture to the right of your name (labeled “edit”) and do one of the following:
- To take a picture of yourself with your Mac’s built-in camera, click the Take Photo Snapshot button. Then click Continue.When the picture appears, you can change its size by using the slider control directly below the image and move it around in the frame by clicking your face and dragging. If you’re not happy with this snapshot, click Retake a Video Snapshot.
- To select a picture from the Picture library, click the picture you want to represent you — the butterfly, dog, parrot, flower, or whatever — and then click Continue.
- Click Continue to exit the Create a Computer Account screen. If you didn’t provide an Apple ID, skip to Step 13.If you provided your Apple ID in Step 6, the Set Up iCloud Keychain screen appears.
- Do one of the following:
- Click Set Up iCloud Keychain. When the screen requesting your passcode appears, type your four-digit passcode, and click Continue.If you’ve forgotten your passcode or don’t have one, click Forgot Code to Reset iCloud Keychain.A verification code is sent to your iPhone or other Apple device.
- Click Set Up Later.If you choose this option, skip to Step 14.
- Type the code in the verification field and then click Continue.
- Wait a few minutes while your user account is created and El Capitan is configured for you.The OS X Finder’s Desktop appears.
And that’s all there is to it. You’re done.
Summary
macOS Recovery can help you easily reinstall the Mac operating system on your built-in drive or an external drive. This blog answers 'Does reinstalling macOS delete files?' Besides, it also suggests using EaseUS Data Recovery Wizard for Mac to recover lost and deleted files in the easiest and safest way.
This page illustrates the detailed process of recovering data from a failed Mac computer before you reinstalling the macOS. If you are having the same issue, follow through this page to see how to get data out of the failed Mac computer before macOS reinstallation:
Workable Solutions | Step-by-step Troubleshooting |
---|---|
Phrase 1. Create Bootable USB | Run EaseUS Mac data recovery software on another Mac computer > Create bootable USB..Full steps |
Phrase 2. Recover Mac Data | Connect bootable USB to failed Mac > Boot computer from USB > recover data..Full steps |
'My macOS Catalina got corrupted, and the login screen doesn't appear. If I reinstall macOS from recovery menu will my previously installed software and data be deleted? And if so how can I back them up on a hard drive, the data and the software are very important to me.'
Reinstalling macOS of macOS Recovery can help you replace the current problematic OS with a clean version quickly and easily. Technically speaking, simple reinstalling macOS won't erase your disk either delete files. You probably don't need to erase, unless you're selling or giving away your Mac or having an issue that requires you to wipe. Besides, If you suspect there's something wrong with your startup drive, you can use the Disk Utility to scan and repair them from the recovery screen, which might be a quicker and more convenient alternative than erasing and reinstalling your macOS.
Reinstalling Mac Os X No Hard Drive Windows 10
How to Recover Data When Mac Needs to Be Erased and Reinstall macOS
If you're encountering the same issue as said at the beginning of the article, that your computer gets corrupted, and you have to consider a complete restart in Recovery Mode. At this time, you need to use the Disk Utility in macOS Recovery to erase your Mac hard drive first, and go on to reinstall the macOS.
As well all know, erasing the hard disk on Mac will inevitably cause data loss and make the files unrecoverable. How to recover data in the easiest way when Mac failed to start? Don't worry, here comes the EaseUS Mac data recovery software, which enables you to create a bootable USB drive on another Mac that works well, then, restart your Mac from it, and go ahead to recover files. Especially to restore data on system drive under macOS 10.13, it's very safe to recover from bootable media. Useful for any emergency, no secondary data damage!
Now, follow the step-by-step guides below to see how to recover data from Mac that fail to start and need to erase and reinstall OS. The whole tutorials will be divided into two parts: how to create a USB bootable media and how to recover data from bootable media.
How to Create a USB Bootable Media
Step 1. Install and run EaseUS Data Recovery Wizard for Mac on another Mac computer, select 'File' > 'Create Bootable USB'. Then, choose a USB drive to create the bootable disc.
- Warning
- The creator will prompt to erase the drive to reallocate the space, then it can write the bootable files to this drive. Please back up all USB files with EaseUS Todo Backup for Mac before processing 'Eraser'.
Step 2. The program starts to create a 2GB space and save the boot files. The rest space on the USB can be still used for storage.
Step 3. Once it completes, please follow the guide to boot the corrupted Mac from the bootable disc and start the recovery. We suggest you restore the data to an external hard drive.
How to Recover Data from Mac Hard Disk
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.
Step 3. In the scan results, select the file(s) and click Recover Now button to have them back.
Mac Os X Disc
After the data recovery, you can use the 'Disk Utility' to erase your Mac disk, and then choose 'Reinstall macOS' to finish the reinstalling.
Reinstall Mac Os X From Usb
See More about EaseUS Data Recovery Wizard for Mac
EaseUS Mac data recovery program allows you to recover deleted files from the emptied trash bin, internal/external hard drive, SSD, corrupted or formatted memory card, including memory sticks, SD cards, CF cards, XD & MMC cards. Besides, it also enables you to recover lost Word, Excel, PPT, etc.