If OS X Yosemite came preinstalled on your new Mac, you’ll probably never need this article. In this article, you discover all you need to know to install or reinstall OS X, if you should have to.
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).
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. How To Reinstall Google Chrome On A Mac. Reinstalling Google Chrome on your Mac follows a similar procedure: Open the Applications folder. In the Applications window, find the Google Chrome app. Sometimes it is easily visible in the Applications folder, but it may be moved to another directory. You can use the search bar to quickly find the app. Depending on your version of Mac OS X ®, the option may say Print & Scan or Printers & Scanners. From the Printers list, highlight the printer you want to delete. Select the minus sign (-) sign, then OK on the confirmation message. Double-click the hard disk icon (in these folders: Library Printers Canon BJPrinter).
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).
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 Yosemite 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 Yosemite only once, or never if your Mac came with Yosemite 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
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- If your Mac is currently running any version of OS X except Yosemite
- 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
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 Yosemite. In other words, these instructions describe the process for installing, reinstalling, or upgrading OS X Yosemite.
If you’ve never had Yosemite on this Mac, the first thing to do is visit the Mac App Store, download Yosemite, and install it. Once you’ve done that, here’s how to install, reinstall, or upgrade Yosemite, 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 Yosemite splash screen appears. Click Continue.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.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 Yosemite software license agreement screen appears. Read it and click Agree.A sheet drops down, asking whether you agree to the terms of the license agreement. 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.
- 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 them in the appropriate fields; click Sign In, and your Yosemite 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 Yosemite 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 Yosemite.
If, on the other hand, you’re installing Yosemite 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. You need to work your way through the Setup Assistant’s screens as described below.
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; 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, and 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 in 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.
- Choose to transfer data, then click Continue, or choose not to transfer data, then click Continue.If this is a brand-new Mac or you’re installing OS X Yosemite 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.Assuming you chose not to transfer data, the Sign In With Your Apple ID screen appears.
- If you want to use your Apple ID with this Mac, type it (such as [email protected]) and your password in the appropriate fields, and then click Continue. Or, 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, it lets you make one-click purchases at the iTunes Store, iPhoto, or the Apple Store, and includes free iCloud membership.The Allow iCloud to Use the Location of This Mac for Find My Mac sheet appears.
- Click Allow or Not Now.The Terms and Conditions screen appears.
- Read the Terms and Conditions and click Agree. A dialog confirms your agreement. Click Agree again.The Create A Computer Account screen appears.
- Fill in the Full Name, Account Name (sometimes called Short Name), Password, Verify Password, and Hint fields, and then click Continue. Or, check the Use my iCloud Account to Log In checkbox. Then fill in the Account Name (sometimes called Short Name), and click Continue.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 before you click Continue.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.Click on the little picture to the right of your name (it’s labeled “edit”) if you want to choose a different picture or take a picture of yourself with your Mac’s built-in camera.If you choose to take a picture, click the Take Photo Snapshot button. When the picture appears, you can change its size by using the slider control directly below the image and/or 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. When you’re happy with it, click Continue.If you choose 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.The iCloud Keychain screen appears.
- Click Set Up iCloud Keychain or Set Up Later.If you choose Set Up iCloud Keychain, a 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.In either case, a verification code is sent to your iPhone or other Apple device; type it in, and click Continue.The OS X Finder’s Desktop appears.
And that’s all there is to it. You’re done.
Your Mac doesn’t work well after you’ve installed macOS High Sierra? Or something went wrong during the installation? One of the easiest ways to fix such issues is reinstalling the operating system. Don’t worry, it won’t affect your files, data, apps, user settings, etc. Only a fresh copy of macOS High Sierra will be installed on your Mac again.
Please note that if you need to remove the data and reset your Mac to factory settings, go for clean install macOS High Sierra. A clean install will delete everything associated with your profile, all your files and documents, while the reinstall will not.
Once you’ve decided that you want to keep all your data intact, take advantage of our comprehensive guide on how to reinstall macOS High Sierra. But before you start, you have to prepare your Mac for the process.
Before You Begin: Back Up Your Data
Although the process of reinstalling is safe, it is still recommended to back up your data. Should something go wrong, you’ll be able to easily restore all necessary files.
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There are a few incredibly easy ways to back up the files, documents, applications, etc. So, you can choose the most convenient one for you. One of the possible Mac backup solutions built into macOS is Time Machine. It allows frequent automatic backups. Surely, you can use iCloud, Dropbox or any other external storage to back up essential data.
Before reinstalling the macOS High Sierra, you might also need to clean the system junk. And not the system junk alone, but also gigabytes of other unwanted files like app leftovers, browser extensions etc. You don’t want to reinstall the operating system with all the clutter it contains, do you? You can clean up your Mac manually, but using an app like CleanMyMac X will save you tons of time. It will scan the system and safely remove all junk in a matter of minutes.
Once you’ve backed up your files and cleaned your Mac, you’re ready to reinstall macOS High Sierra.
A Step-By-Step Guide to Reinstall macOS High Sierra
Here’s how you can reinstall the macOS High Sierra and keep all files and user settings.
- Back up your Mac before you begin (just make sure you didn’t forget to do it).
- Click the Apple icon in the top left corner of your screen and choose Restart from the menu.
- Use the combination of Command and R keys; you’ll see the macOS Utilities window.
- Pick Reinstall MacOS.
- Click Continue.
- Select your hard drive (this is usually Macintosh HD).
- Click Install and complete the process.
That’s it! As you see, reinstallation is not a difficult process and it has an obvious advantage — it keeps all your data and configurations untouched. Now you can enjoy the new exciting features of macOS High Sierra, like faster Safari and better graphics.
However, if you don’t like the new version of macOS, don’t let it give you a bad time. You can always downgrade to Sierra. But before turning to such radical measures, try to reinstall the macOS High Sierra. Probably it will resolve all the issues.
We hope you found this article helpful. Have a nice day and stay tuned!