- Step 1:Make sure to backup all your data before you begin the updating process. You can use the Time Machine backup to save your files.
- Step 2:Plug in your MacBook or Mac computer to a power source even if the battery is full.
- Step 3:Ensure that you have an active internet connection with good speed to start the update.
- Step 4:Go to the Apple menu on the top-left corner and select System Preferences.
- Step 5:If an update for OS X El Capitan is displayed, click Update.
- Step 6:Otherwise, select the Star icon on the top menu bar representing Featured.
- Step 7:Click the Download button on the OS X El Capitan section.
- Step 8:Wait till the download is complete, it takes about 40 minutes.
- Step 9:Navigate to the Purchased section on the App Store to view the downloaded update.
- Step 10:Once the download is complete, the “Install OS X” window appears on the screen.
- Step 11:If the window doesn’t appear, double-click on the downloaded file to begin the updating process of your Mac.
- Step 12:Click Continue to install the OS X El Capitan version. Accept the terms of the license agreement and accept it.
- Step 13:When prompted, enter the admin password of your MacBook/Mac computer to install OS X. Then, click OK.
- Step 14:The preparation for installing may take around an hour to complete.
- Step 15:In the Ready to Install window, click Restart.
- Step 16:Once the computer restarts, wait until the installation is finished.
- Step 17:When the Diagnostics & Usage screen appears, checkmark your preferences and click Continue.
- Step 18:Once the Setting Up Your Mac window disappears, you are successfully update Mac to 10.11.