After the booting, choose the USB drive that says “Install OS X Yosemite. Create a bootable OS X El Capitan USB flash drive. Restart your Mac and keep holding Options key. With that out of the way, follow the steps below on how you can clean install OS X El Capitan on your Mac. Now that you have created the bootable, it’s time to install the El Capitan in it. Just use it, select El Capitan when asked about for which OS you want to make the USB bootable. This tool is recently updated to support El Capitan. I would suggest the easiest, which is to use DiskMaker tool.
In order to make a USB bootable, there many different ways. You should now format your USB drive and make it bootable in order to save the El Capitan file in it. The OS X El Capitan file will be downloaded in the Applications Folder in your Mac in the form of a file titled Install OS X El Capitan. Next, you need to download official OS X El Capitan, which is available from Mac store. Note: In order to clean install OS X El Capitan in Mac, you will have to erase your hard drive contents completely show below. Related Read: Check If your System is Compatible with OS X El Capitan
This USB will be used exclusively for downloading and saving Mac OS X El Capitan. In order to clean install OS X El Capitan, you must have a USB with 8GB free space. Clean Install OS X El Capitan or Upgrade Your Existing OS X to El Capitan Clean Install El Capitan The second option is to clean install OS X El Capitan. The first one is to upgrade your existing OS X, be it Yosemite, Mountain Lion etc. There are two options to install OS X El Capitan in your Mac. I have a MacBook Mid 2007 (more technically named MacBook2,1) that officially can not be upgraded beyond Mac OS X 10.OS X El Capitan wont install on top of. El Capitan was announced a few weeks ago and people were waiting for it as it promises a lot of stability, great new features and control. Apple officially launched OS X El Capitan and millions of Mac users around the world are emphatically searching for ways to download and install this new piece of software.