I am new to Final Cut Express. Video is .mov extension. Imported and dragged to the viewer. Dragged to the Canvas. Clip is about 1 and half minutes. When played prior to any effects, plays ok. only after I add a few effects do I start getting the Dropped frame message. The cause is either a slow hard drive? I am using the internal hard drive that came with the iMac. Am I to believe that this machine (the iMac) is not capable of playback of the video that I am editing? Is this a hardware issue?