Recently, Apple has released Mac OS X El Capitan for its users worldwide. And people have received this new OS with open arms. But there are many who are not comfortable with the new version. So what is the solution? Obviously, go back to OS X Yosemite.
This information is all about how to delete OS X El Capitan, how to reinstall OS X Yosemite, and finally how to restore your database from Time Machine.
First, How to Erase OS X El Capitan:
Note: Before moving ahead, please make sure that your Mac is connected to internet.
Step #1. Click on Apple icon () from top left corner and select Restart.
Step #2. While your Mac is in restart mode, press down Command+R.
Step #3. From the OS X Utilities, click Disk Utility.
Step #4. Click Continue.
Step #5. Click on Startup Disk.
Step #6. Now click on the Erase.
Step #7. Type in Macintosh HD for the name (or other of your choice.)
Step #8. Select Mac OS Extended (Journaled) from the Format list.
Step #9. Now click Erase.
Once you erase OS X El Capitan, quit Disk Utility and start reinstalling OS X Yosemite.
How to Reinstall OS X Yosemite on Your Mac
Step #1. From OS X Utilities, click on Reinstall OS X.
Step #2. Now click Continue on the OS X Yosemite Installer.
Now follow the standard instructions as you would in any other update; keep clicking on continue and agree to the terms & conditions. Once you finish this, your Mac will restart and you can use OS X Yosemite.
Note: The version of installer depends on how old your Mac is; normally, you will get what you have received from Apple during the purchase of Mac.
In this situation, complete the installation of Lion, Mountain Lion, Mavericks or any other version you have available. Once the update is finished, your Mac will restart. Now go to the Mac App Store and re-run the OS X Yosemite update.
How to Restore Data from Time Machine on Mac
Once you downgrade from OS X El Capitan to OS X Yosemite, you will be prompted to restore your data from Time Machine. Without this action, the reinstallation process is incomplete. However, you can restore your data anytime later.
Step #1. Restart your Mac.
Step #2. Press down Command+R while Mac restarts.
Step #3. Click Restore from Time Machine Backup from the OS X Utilities menu.
Step #4. Click Continue.
Step #5. Click Continue after reading “Restore Your System” page.
Step #6. Select Time Machine Backup.
Step #7. Click Continue.
Step #8. Select the most recent backup and click Continue.
Your data will be restored from the Time Machine and Mac will restart; the process may take some time, depending on the network speed or amount of data you have.