I've thought of just about everything, and can't figure out for the life of me why this thing seems to have slowed to a crawl. Boot up takes forever, and that's with minimized startup items. Launching any Adobe product takes ages. Safari takes ages to launch. The whole thing should be light years faster than it is. Any suggestions? iMac (Retina 5K, 27-inch, Late 2014) 3.5 GHz Intel Core i5 24 GB 1333 MHz DDR3 AMD Radeon R9 M290X 2048 MB All media is external raid drive. Fusion drive is split into two with apps on the SSD. I'm lost and annoyed.