Reinstall Os X Yosemite

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Apr 06, 2021 Reinstall macOS. Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions. Follow these guidelines during installation: 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. Re-installing OS X Yosimite i recently Sold my Macbook. I un installed the OS X as i have in the past, but when i try and connect to the Apple Store it keeps saying 'This item is temporarily Unavailable, Try again Later'. Mac OS users who want to install OS X 10.10 Yosemite on their machines and are facing issues installing the operating system for the first time on their Macs can follow a simple step-by-step guide.

Clean Installing OS X Yosemite | The three steps to clean installing OS X Yosemite

Do you want a brand new start on your Mac with no apps or files? A clean install of OS X Yosemite is just the thing for you. Now, there are three things you’re going to want to do in order to perform a clean install: clean up your Mac (which is a quick, easy task with CleanMyMac X), back it up with Time Machine, and then install a fresh copy of OS X Yosemite.

We’ll go over all three steps below. So, let's start with number one — Cleaning up your Mac.

Step 1: Clean up your Mac

How to reinstall os x yosemite

So listen, you’re definitely going to want to do a backup of your Mac in case something goes wrong. To make that process easier, you should first clean up your Mac. It may sound like a daunting task, however, there are tools that can help you out, like CleanMyMac. Cleaning up your Mac with CleanMyMac X will save you time and the stress of cleaning it up yourself. Download CleanMyMac X and follow the steps below before backing up your Mac:

  1. Launch CleanMyMac X.
  2. Click Scan.
  3. After it’s done scanning, click Run.

And that’s all it takes to do basic Mac cleanup with CleanMyMac X. If you’d like to clean up more junk on your Mac, check out the sections on the left side of the app. It will help you take care of tons of other cleanup items. After you’re done cleaning the junk off your Mac, it’s time for the next step.

Step 2: Back up your Mac

Backing up is just good practice. If something goes wrong, you don’t want to be left stranded without a backup of your Mac. Now, if you don’t wish to back up your Mac, you can proceed to step three. But remember, if you don’t have a backup and something goes wrong, you won’t be able to recover or restore anything from your current Mac. With that said, here are the steps for backing up your Mac:

  • Go to your Applications folder and click Time Machine.
  • Click on “Select Disk.”
  • Select the external drive you wish to save your backup. An Apple Time Capsule is the ideal place to save it to. If you don’t have one, choose a different external drive.
  • Click “On” to turn Time Machine on; the button is located on the left-hand side of the menu.
  • To the right, below the name of the storage device, you’ll find, “Oldest backup,” “Latest backup,” and “Next backup.” Your backup should start within the next 5 minutes.

Reinstall Os X Yosemite Disk Locked

Once you’re done backing up your Mac, head to the next section.

Step 3: Clean Install OS X Yosemite

It’s time for a clean install. We’re going to show you how to do it without using a USB drive, which makes it much easier and less confusing. So to start, you should download OS X Yosemite from the Mac App Store. Once it’s finished downloading, it’ll immediately load up on your screen. Follow the instructions to install OS X Yosemite. Once it’s done, it’ll ask you to restart your Mac. Do it, and once it’s loaded up, we’ll start the clean install process:

  1. We’re going to restart your Mac again. But this time, hold down Cmd+R. (Keep holding it down while it restarts, do not let go!)
  2. Now, your Mac should load a screen with a few options (you can let go of Cmd+R now).
  3. Select the Disk Utility option.
  4. In the window, at the top of the left bar, select your Mac’s Main Drive. It should be something like MainHD.
  5. Now, select the Erase tab, located next to the First Aid button at the top-center.
  6. Near the center of the window, select the Format drop-down list and select “Mac OS X Extended (Journaled)” as the type.
  7. Click Erase (this will erase your main drive!) and allow some time for the drive to format.
  8. When it’s finished, close out Disk Utility and select “ReInstall OS X” from the menu. It will ask for your Mac App Store password to redownload OS X Yosemite. Give it a minute to do so.
  9. A new window should pop up and OS X Yosemite should begin to install. If it does not, press back and enter your password again.
  10. Once again, follow the install instructions and enjoy your newly clean-installed OS X Yosemite.
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On this page:

  • Reinstalling Yosemite on a computer alreadyrunning it

Upgrading from previous versions to OS X 10.10 (Yosemite)

OS X 10.10 (Yosemite) is no longer available for purchase from theMac App Store. If you have a previous version of the operating system,and your computer meets the system requirementsfor OS X 10.11 (El Capitan), you can upgrade directly to thatversion instead; see ARCHIVED: Install or upgrade OS X 10.11 (El Capitan)

Reinstall Os X Yosemite An Error Occurred

Reinstalling Yosemite on a computer already running it

To reinstall or recover Yosemite, you must have an active Internetconnection. If you are on campus at IU, UITS recommendsthe wired Ethernet network instead of wireless. However, if IUSecure is your only option, see Connect to an IU wireless network in macOS if booted from your Recovery HD

Reinstalling while keeping files, applications, and settings

  1. Restart your computer, and immediately hold down command-r until the gray Apple logo appears.
  2. If prompted, select your main language and then click the arrow.
  3. Click Reinstall OS X, and then Continue. Follow the instructions on the screen, and then choose your hard disk. Click Install, and enter your Apple ID information if prompted.
  4. When the installation is complete, select App Store... from the Apple menu, and install any available updates.

Install Os X Yosemite

Reinstalling while erasing everything on your computer

Reinstall Os X Yosemite Macbook Pro

  1. Restart your computer, and immediately hold down command-r until the gray Apple logo appears.

  2. If you see a screen asking you to select your main language,choose it, and then click the arrow.
  3. Click Disk Utility, and then Continue.
  4. In Disk Utility:
    1. Click your hard disk in the left column, and thenclick the Erase tab.
    2. Next to 'Format:', make sure Mac OS Extended (Journaled)is selected. In the 'Name:' field, give your disk a name.
    3. If you would like to securely erase your data, click SecurityOptions..., adjust the slider accordingly, and clickOK.
    4. When you're ready, click Erase..., and thenErase again to erase your disk.
    5. Once it's completed, quit Disk Utility.
  5. Click Reinstall OS X, and then Continue:
    1. Follow the instructions on the screen, and then choose your harddisk.
    2. Click Install. If prompted, enter your Apple IDinformation.
    3. Once the installation is complete, you'll beasked to enter basic information, and have the option to transfer datafrom another computer or backup.
  6. From the Apple menu, select App Store, and then installany available updates.