Short version: How can I process large (3GB+ each on the camera) video files with my mac? I imported some from the camera via iMovie, but I can't seem to access them. When I click on the imported file and make a new project, I can't do any editing at all, no matter how long I let the computer run. Help! Long version: Hey all, I've only gotten into iMovie and processing videocamera files within the last 6 or so months, so any help is quite welcome. I've been using my Panasonic HDR-S200 as a kind of "security camera" of sorts, just to monitor a certain area. I set the camera to record to its HD and it will record all day, and automatically breaks the recording into 4 hour chunks. The camera has a setting for resolution too, so I set it for the lowest resolution. After 24 hours, I imported the files into iMovie directly from the camera to the iMac, (2011 2.7 i5, 12GB RAM, Mavericks, about half the space on the 1TB HD available.) I also just copy the files directly from the camera HD to the Mac HD, just in case I need other options. So while using iMovie, the files import into the event library no problem, and I can actually browse through them. But I have been unable to edit them as projects. I can drag them to the project window, but after that, iMovie gets a little screwy. I just can't edit them. The little files are no problem. All I really need to do is add a time/date stamp and speed up the replay for easy review and note-taking. That's the extent of what I need to do. I assume that the file size is what is borking the project here, but I don't have a way to reduce the file size any further. How can I edit these files? Any help would be greatly appreciated.