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I have been getting the same console error in my app that processes a PVR recording.
` [aqme] MEMixerChannel.cpp:1639 client <AudioQueueObject@0x11bc31000; Unknown FigPlayer; [0]; play> got error 2003332927 while sending format information
Apple AV core media seems unable to smoothly handle anything but "perfect" AV streams.
At least this one does not cause the spinning beach ball (well, yet, anyway)...
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Confirming you experiences. Getting my head arounce NSCollectionView by running through the Wenderlich tutorial. Got it all working, more or less, and then tried adding the toggleSectionCollapse and got the result that you also report. The inter item spacing is ignored and it rams ALL the section items into the collapsed view, in what I would describe as "shingle" style. Suscpiciously similar to the visual display in the Apple NSCollectionView objective C sample code from 2015 (which of course predates the toggleSectionCollapse....) Google has not been my friend in finding any working sample code. Anyone else had success ?Additionally for anyone else that finds this, I find that the AppKit update instructions for sectionCollapse do not work properly. Updating the button text to show more/less within the toggleSectionCollapse function plays havoc ( from some debugging you are setting the text of a button that is about to be re-used when the reloadData() rebuilds the header views....) I found a more effective location is to set the text in the call that creates the header (use the section index to check if it is collapsed and set the button text accordingly).
"My bad" as the grammatically challenged would say....... 😟 A fined grained item for item check of the storyboard revealled that I had bound the CollectionView/Content to the ArrayController.SelectionIndexes ..... when surprise, surprise, I should have bound the CollectionView/SelectionIndexes to the ArrayController.SelectionIndexes.....sigh....Alan.
