A query mark folder on a MacBook is a particular folder that’s created when a file or folder is moved to a location that it isn’t allowed to be in. For instance, when you attempt to transfer a file out of your Desktop to your Functions folder, macOS will create a query mark folder within the Functions folder and transfer the file there. It is because the Functions folder is a protected folder and solely incorporates functions which have been put in by way of the Mac App Retailer or from a developer.
Query mark folders are additionally created when a file or folder is moved to a location that doesn’t exist. For instance, when you attempt to transfer a file to a folder that has been deleted, macOS will create a query mark folder within the dad or mum folder and transfer the file there. It is because macOS doesn’t know the place to place the file because the folder it was presupposed to go to now not exists.