Importing 4k into IMovie 10.4.1
I've got imovie 10.1.4. I have a video recorded at 4K 24 fps that cannot be imported into imovie. I have tried converting it and compressing it in several formats with no success. I realize that I need to update my iOS but this means me buying a new computer. Is there a temporary work around so that I can import and edit this video I have already recorded? Or a suggestion for another video editing software that can be used?
MacBook Air 13″, macOS 10.12