iphoto 6.9.1 does not import .MOV files

v9.6.1 was the final version of iPhoto.

I would strongly suspect that the story here is more simple: you have a video clip shot on an OS 8 years newer than the app you're trying to manage it with. Eventually, any app that's not in development gets left behind.

With video, these file extensions do not mean the contents are the same. MOV is a container, and with video the important thing is not the file extension, but rather the codec used to package the video stream. In other words, not all MOV files are the same.

You could try open the clip with Quicktime and then save it. That can work with Jpegs. I make no promises. I would suggest that now is a good time to research and decide what app you'll use next for managing your photos and video. You're going to be migrating sooner rather than later.

Are you asking about iPhoto 9.6.1? iPhoto 6.x.x would not be able to run on OS 10.13.6. Or are you asking about Photos 6. not iPhoto?

What is the source of your videos? Are you trying to import videos from an iPhone or older videos from some external drive? Are you getting an error message, when you try to import? If yes, what is the message?

I am using iPhotos

Not to be pedantic (he said, about to be pedantic) but there is no such app as "iPhotos". There was iPhoto (no 's') and there is Photos (no 'I'), they both had/have a v6 and a v9. As they are quite different apps the reasons for your problem and the possible solutions may. well be quite different. As you mention 'Events' I suspect you're using iPhoto v9.6.1, released 9 years ago. Can you confirm?

What has changed? Has the video from the OS 17 device ever been accepted by iPhoto?