How to Downgrade OS X El Capitan to OS X Yosemite

OS X El Capitan public beta now available for download without paying for Apple’s Developer Program. We all know that the new system should be fluid, stable and fast course. On the contrary, the public beta versions also full of lags, crashes and problems. If you just installed OS X El Capitan on your Mac and feel not satisfied even worse, well there is a simple way to let your Mac back to OS X Yosemite, this means you can easily downgrade El Capitan back to Yosemite at any time.

OS-X-El-Capitan-Install

Downgrade OS X El Capitan to OS X Yosemite

Your Mac must be connected to a stable Wifi internet connection for the process to take place easily.

  1. Open the  menu in Mac and click on “restart”.
  2. Now press and hold down the Command+R button during the rebooting process of your Mac.
  3. Go to OS X Utilities sector and click on Disk Utility.mac-os-x-1
  4. Click Continue.
  5. Select Startup Disk according to your choice.
  6. Click on Erase tab.
  7. Type in any name you want, select Mac OS Extended (Journaled) for the format and click “Erase”.mac-os-x-2
  8. Once the process is done, close the disk utility.
  9. Let’s now move on the process of reinstalling Mac OS X Yosemite.
  10. Go to the OS X Utilities section and click on Reinstall OS X.
  11. Click Continue on the OS X Yosemite Installer.mac-os-x-3
  12. Just follow the on-screen instructions and agree to the licensing terms when asked.

That’s it. Restart the Mac and you will see that Mac OS X Yosemite is running on your machine.

If you have a Time Machine backup, you need this support page:

https://support.apple.com/kb/PH18848?locale=en_GB

You can also restore the OS X Yosemite using a USB drive.

First download the OS X 10.10 Yosemite installer from the Mac App Store in the Purchases section (you may need to hold alt/option while selecting Purchases. Once it’s downloaded, just quit the installer and set the downloaded file’s name to InstallOSXYosemite.app (make sure only .app, not .app.app)

  • Plug in your USB drive into the computer and open Disk Utility (in Applications).
  • Select the USB drive from the left sidebar and click on Erase tab.
  • Choose Mac OS Extended (Journaled) in the format box and set the name be YosemiteInstaller
  • Now click on Erase button and wait until the format process completes.
  • Then choose Partition tab and select 1 Partition from Partition Layout dropdown menu. Click on Option and ensure GUID Partition Table is selected as the partition scheme, with its name set toYosemiteInstaller.
  • Launch the Terminalapp (in Applications/Utilities) and copy-paste the following command in, and then hit Enter:
    • sudo /Applications/InstallOSXYosemite.app/Contents/Resources/createinstallmedia –volume /Volumes/YosemiteInstaller –applicationpath /Applications/InstallOSXYosemite.app –nointeraction
  • This will create the bootable USB flash drive. This takes between 10-20 minutes. Do not interrupt the Terminal or eject the flash drive during the process. Once the process completes, you will see the message “Copy Complete. Done.”

The OS X Yosemite bootable USB flash drive will be ready for use and you can start the clean installation process.

How to Clean Install OS X Yosemite on Your Mac

  • Ensure the bootable USB flash drive is plugged into your Mac and restart the computer. As soon as the start-up chime plays, press the Option key (Alt).
  • Choose the USB drive on the start-up drive selection screen and hit Enter/Return on the keyboard.
  • Wait until the Yosemite installer appears on screen. This could take a few seconds or minutes.
  • Click on Disk Utility and then hit Continue.
  • Click on Macintosh HD from the left hand-side pane and then hit Erase tab on the top-right portion of the window. Leave all the settings at their default values and then hit Erase button at the bottom right. This will wipe all files stored on your startup hard drive.
  • When the erasing process is complete, return to the first screen where you selected Disk Utility. Now click on Install OS X and then hit Continue.
  • Choose the Macintosh HD partition you erased in step 5 and then click Install.

Course if you not yet install the public beta on your Mac, and can not wait until the official release this fall, then follow the below steps to install the public beta of El Capitan right now.

How to Install OS X El Capitan Public Beta

  1. Go here and register to enroll in and participate in the OS X El Capitan Public Beta program
  2. Start a back up with Time Machine and let it complete
  3. Download the OS X El Capitan Public Beta from the Apple website, the download goes through the Mac App Store as usual. You can check the status of your download in Launchpad or inside the App Store.
  4. Once your download is completed the OS X El Capitan install will launch. Hit continue to begin the installation process.
  5. Select the disk that you want the OS X to be installed and wait for the installation process to finish. Depending on your computer specs and connection, the download should take around 45 minutes to an hour.
  6. Once installed you will need to restart your device so make sure to save any unfinished work. Upon boot you will have a fresh installation of OS X El Capitan installed.

If you do run into any issues there is a Feedback Assistant installed. Click on this to send any issues or suggestions to the Apple development team.

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1 comment

  1. 1

    Thanks for the information. I’m downgrading to Yosemite as we speak (borrowing my dad’s PC to read the instructions) because it keeps causing my Mid 2009 model MacBook to restart while it’s trying to boot. It never did this with Yosemite. I had to reinstall El Captain several times and it didn’t work. Hopefully Apple will fix this problem eventually!

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