Final Cut Pro X and 360 projects issues (missing plugin)

I am on 10.4, yes. I do have the plugin. I've been using an external drive for all my FCP work, and so literally the same files that are working on one computer are not on another. I've checked the rights on the drive, I've also copied the files locally to the computer they don't work on, and that hasn't made a difference. Here's specifically the error when I try to import a rendered GoPro Fusion file:

The "missing plugin" is from a project successfully imported on another iMac.

Here's the versioning info:

I can't see the media in the browser (that was imported by the working iMac):

If I plug this same drive into the other iMac (which I've done a few times now), FCP can see everything, and I can import new rendered files without issue. I did go from an iMac i7, to an iMac Pro... is there's a possibility there's a bug in FCP with the new hardware? I feel like I read somewhere that FCP was specifically optimized for the iMac Pro. It's probably user error, I fully realize that, but I'm running out of ideas...

Really appreciate you taking the time Tom. I will say, the one difference between the two builds (despite them both being 10.4) is the new build is missing the "Add 360 Patch" under edit:

I don't know if your build has it, but even on my working iMac when I'm in a project with no 360 content, it will still have that option but greyed out. So it seems like there is something different. But I do have the other 360 content (viewer etc..) and like I said, the App Store things I'm fully updated and it looks as though I am (though if there's a way to compare specific builds of an app other than just the version in About, let's have a look at that)

This is way beyond my knowledge unfortunately, but here's an example of it working. I mentioned earlier on in this thread that there was one clip that works within the new iMac (where as all of them work on the old one). Both clips seem to be identical. Is there anything else I should be looking for? I'm happy to have a solution moving forward, but I'm still working on some past clips and projects, that I'd love to finish up on the new iMac.

I've been working with GoPro Fusion files for the past 3 months, and both FCP are at the same version (if there's a way to check the exact build number, I'd love to do that, but not sure how to. Either way, neither version has any updates waiting for it in the App Store). The files are stitched using GoPro Fusion Studio. Same stitched files, on one iMac they work, on the other they're not working.

Hi Tom,

Here's a short Fusion rendered file that imports just fine in my old computer, but does not import in on my new one:

https://we.tl/LhNzAYSn3F

The "Add 360 Patch" button seems to just add the FCPX patch to the clip. I did not install any plugins. I know people sometimes say this and they forgot that they installed something or another, and that statement doesn't generally come with a lot of credibility... but I'm a fairly focused FCPX user, and my only goal was to edit GoPro Fusion files. I didn't even know there were a bunch of neat patches I could add until I googled this.

Yeah, it's a bit of a mess. The FCPX files imported on the other iMac are giving errors, and new files aren't importing. Let's just focus on getting files imported at this point. I didn't realize I couldn't import new files. That's concerning. Let me know what you get with the link about I guess?

That's a huge help. I didn't do anything FCPX wise on the other (working) Mac, but I probably have plenty of codecs from various software installed... so sounds like I just need to figure out how to play this codec on FCPX. I can stitch future products in a different codec, but stitching is such a time consuming process I couldn't possibly do it for the many-hours of videos I have... This is, unfortunately, way beyond my knowledge though! I'll see what I can find

You absolutely can export in other modes, but it's not intuitive. Have a closer look at the instructions here:

https://gopro.com/help/articles/how_to/how-to-render-videos-in-fusion-studio

Before you render, you hit the grey area, and you can further configure what you're rendering to either H.264 or ProRes 422