Reinstalling Os X Yosemite

Unzip the provided zip directly onto the usb, it takes awhile. Rename the top most folder from 'Install OS X Yosemite.app' to 'Install OS X Yosemite' (the next folder in should have the.app on the end) Eject the usb drive (usb2) and plug it into the mac. Verify and repair usb2 if needed in disk utility using the first aid panel. OS X re-install without loosing any information or apps, Yosemite OS X, mavericks osx.Macbook pro, iMac, Mac mini, Mac pro, Macbook retina display, macbook a. Reinstalling Yosemite on a computer already running it. Reinstalling while keeping files, applications, and settings; Reinstalling while erasing everything on your computer; Upgrading from previous versions to OS X 10.10 (Yosemite) OS X 10.10 (Yosemite) is no longer available for purchase from the Mac App Store.

  1. Reinstall Os X Yosemite An Error Occurred
  2. Reinstalling Os X Yosemite Download
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Reinstalling Os X Yosemite

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)

Reinstalling

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
Reinstall os x yosemite without apple id

Reinstalling while keeping files, applications, and settings

Reinstall Os X Yosemite An Error Occurred

  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.

Reinstalling while erasing everything on your computer

  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.


In this video I show you how to reinstall MAC OS X on your apple computer. This method should work on all apple computers and with all recent versions of MAC OS. For this guide I used a friends Macbook Pro that they had accidentally formatted the entire hard drive on, erasing all of their information but also the operating system. The Yosemite installer application (Install OS X Yosemite.app) I use was downloaded from the app store.

To follow this procedure you will need a flash drive / USB stick of at least 8GB capacity and another (working) apple mac or computer running MAC OS.
This process can take a long time depending on the speed of your USB drive, I recommend using a USB 3.0 stick in a USB 3 port.

IF YOU GET THE “This copy of the install OS X (VERSION NAME) application can’t be verified. It may have been corrupted or tampered with during downloading.” ERROR WHEN INSTALLING…
You need to change the date / year on the computer using the command line (terminal) as shows in the video at 9:13 – The most important part of the date is that the year should be set to the same year that your installer was downloaded.
You can view this by right clicking on your “Install OS X VERSION.app” file and choosing “Get Info”, then reading the year under “Created” or “Modified”.

Names of commonly used MAC OS installers: (from the app store)
Install OS X Mavericks.app
Install OS X Yosemite.app
Install OS X El Capitan.app
Install macOS Sierra.app
Install macOS High Sierra.app
Install macOS Mojave.app
Install macOS Catalina.app

Command for the terminal to create your USB stick:
IMPORTANT: Remember to modify it (as shown in the video at 3:16 ) for your version of the Mac OS X installer!
– – – – – – – – – – Yosemite USB Creator.txt – – – – – – – – – –
sudo /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/USB –applicationpath /Applications/Install OS X Yosemite.app –nointeraction
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

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Reinstalling Os X Yosemite Download

Tested and working 100%, multiple times by myself using Mac OS X Yosemite & El Capitan on Macbook Pro’s.
This should work fine with all other versions of Mac OS X and all other apple Mac computers! Including Macbook Pro, Macbook Air, Mac Pro, iMac, Mac Mini, Apple Laptops, Macbook & iMac with Retina or 4K / 5K Display and more.
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