I'm using a cell based NSTableView.

There may be a better (or "more correct") solution but I solved it by copying the file I needed into the user's Documents directory then deleting it when it was no longer needed. (it only needed to be there for fraction of a second.)

I think I discovered that CIFilter allows me to do this with CIImage that I then convert to NSImage. (unless there is a better, simpler way?)

I've tried every combination of interface options, sandboxed, unsandboxed, permissions changes to the .mov files... doesn't seem to have helped. Can anyone lend some insight?

I tried a different approach to adding the images to the Photo Library, using: func createStillAssetOnAlbum(asset: URL, album: PHAssetCollection) { let photoURL = asset PHPhotoLibrary.shared().performChanges ({ let creationRequest = PHAssetCreationRequest.forAsset() let placeHolderAsset = creationRequest.placeholderForCreatedAsset creationRequest.addResource(with: .photo, fileURL: photoURL, options: nil) guard let albumChangeRequest = PHAssetCollectionChangeRequest(for: album) else { print("album change request has failed") return } albumChangeRequest.addAssets([placeHolderAsset] as NSArray) }, completionHandler: { success, error in if success { print("photo (and adjustments) saved successfully") self.importCount += 1 } else if let e = error { print("error saving photo (and adjustment): \(e)") self.nonImportedImageCount += 1 } }) } This seems to work as I would expect.

@IBAction func selectLisaIngestPreviewFolder(_ sender: Any) { let openPanel = NSOpenPanel() openPanel.canChooseFiles = false openPanel.canChooseDirectories = true openPanel.message = "Select Lisa Preview folder" let response = openPanel.runModal() switch response.rawValue { case 1000: print(response.rawValue) case 1001: print(response.rawValue) default: return } }