Install OS X 10.11 El Capitan Beta Without Developer Account: If you want to install OS X 10.11 El Capitan Beta without having to purchase a developer account, you will be happy to know that there is in fact a way to do it.
Before proceed, make sure you have an valid license of Mac OS X and you are running an genuine Mac device compatible with OS X.
Step 1: The first step in this process is to open up Safari or whatever web browser you use and navigate to: http://imzdl.com/osx.html
Step 2: Go to the bottom of the page and click the last “Friendly Name”, called OS X 10.11 Beta 1, 2, , 4 … and click “Direct” for a direct download
Step 3: The file will automatically download within 10 seconds after you click on it. After the file has downloaded, you will need to click on it and a window will open.
Step 4: Click “Agree” at the bottom of the window and then “Agree” again on the next window that appears with text that reads “I have read and agree to the terms of the software license agreement”
Step 5: Click on “Macintosh HD” and then “Next”. You will next be prompted to enter your password, so go ahead and enter in the information
Step 6: The installation will begin and it takes a little while so be patient. After the installation finishes you will have OS X 1.11 on your computer