Greetings all. I have been a Apple user for a number of years, however I took a short break and had a Windows based machine for some time and when I finally came back to OS X on my new iMac I had some catching up to do. My iMac is a late 2013 model, with 8GB of ram, Intel Iris Graphics, and a 2.7 Ghz i5 processor. This machine runs great, but sometimes opening applications is a bit buggy. I find iMovie is really bad for this and runs sort of sluggish, even though it isn't really processing or organizing any files. Is there anything additional I can do to improve the speed of my iMac? Processes to close or things to clear out? I don't download anything questionable, I strictly use iTunes and the App store, and on occasion Battle.net and Adobe Creative Cloud for all of my media and entertainment needs. I will add that I have the current available stable release of OS X El Capitan, but I sure do miss OS X Mavericks. I wish I could go back to that, but oh well I suppose! Any sort of tips or advice would be greatly appreciated.