Some users will see slow OS X El Capitan performance after upgrading, especially on an old Mac. This could be due to the need for more Memory or it could be that you need to free up disk space. You may also need to do a little housecleaning.
If everything is slow, including what you type appearing on screen, restart your Mac. You may need to close apps and choose to save something before it completes. For a better and clearer guidance on OS X dial Apple Support Number for certified Apple technicians. The next thing to check is to see how much memory (RAM) your Mac has and if you can upgrade it. On many older Macs you can upgrade RAM to make the computer run faster, but on newer models this is not the case.
Visit Apple MacBook Help website for troubleshooting steps. On your Mac, click on the Apple in the upper left, and then click on About This Mac. Then click on Memory and Memory Upgrade Instructions. You should also check to see if you need to clean up your hard drive so that there is enough room for OS X El Capitan to store files it needs.
External Link: 800-961-1963-OS X El Capitan Microsoft Office 2016 Problems; Get Apple Support | http://bit.ly/2jXDxDx | https://goo.gl/QHyT9o
Write something about yourself. No need to be fancy, just an overview.