In this topic, we give very specific instruction to install Mac OS X 10.11 El Capitan on a Mac for a new and fresh OS.
Step 1: Create an El Capitan USB Installer.
Step 2: Plug the Bootable USB into the Mac, then keep holding the OPTION key after pressing the Power key to go to Boot Option screen. Choose “Install OS X El Capitan”.
Step 3: Choose Disk Utility from the OS X Utilities screen.
Step 4: Select the Mac driver normally is named Macintosh HD, then click on Erase button.
Step 5: It is able to name the Mac driver or just keep the original name at Macintosh HD. OS X Extended (Journaled)** must be chosen under Format. Next, click on Erase button.
Step 6: We now can quit Disk Utility, return to the OS X Utilities screen, then choose Install OS X.
Step 7: From now, just follow the installing instruction on the screen, you then will get it done!