Hey all, I've got a late 2011 13" macbook pro with 4gb ram and the standard 500gb hard drive. I'm leaning towards making the investment in an SSD, but haven't pulled the trigger quite yet. I'm currently running Mavericks. It runs very smoothly 95% of the time with occasional slowdowns. When Yosemite was released, I tried upgrading. I was running it for a few weeks and it was so slow my computer was almost unusable. I reverted back to Mavericks and ran perfectly fine again. I want to upgrade to El Capitan, but am hesitant with my Yosemite experience. I know the modern OS's are meant to run on SSD's, however, I thought the system requirements for Mavericks and Yosemite were the same, thus I shouldn't have experienced that much of a slowdown. My point is, will my standard HDD be able to run El Capitan? Has anyone without an SDD tried upgrading? I don't need it to be incredibly fast, but I'd like to take advantage of some of the newer features such as iCloud drive that aren't built into Mavericks. Thank you!