For the past two days, I have experienced the spinning beachball constantly. I am using a Macbook Pro, El Capitan, 10.11.6. In the couple years I've had the computer, I have never had a problem with this. The first time it happened, I was using a free wireless connection in a retail store. During this time, I also got a "Your startup disk is almost full warning". I've cleared some memory, I have 27GB open, but the spinning beachball hasn't stopped. There have been plenty of times in the past where I've had far less memory available and this hasn't happened. It spins every time I click a link, every time I start to type in a search bar, and every time I try to scroll using the two finger method or the side bar. I have run Etrecheck and there is nothing that seems out of the ordinary, but I'm not a very savvy computer user. It did say my Flash was out of date so I updated that. My cache folders are are very small, under 1GB. I have not downloaded anything new within the past couple weeks. Any ideas what might solve this problem? If you need other information please let me know. I appreciate any help you can offer.