On IOS you are able to create your own memories. One possibility is to use "Moments", hit the button to edit the slide show -> you get told that a memory has to be created if you want to edit it -> you confirm it and after that you can edit the created memory. One thing you can do is to add additional photos or remove some which already have been included. After doing all changes you have your own memory. You will get it synched to all your devices. BUT -> only on my IOS devices i can see the customized memory. On my Mac, running MacOS Sierra, i do NOT get the customized one. I get the default one, the automatically created one based on the "Moment" -> that means the changes i did on IOS are not included in the memory on MacOS. I hope my explanation is clear. As a matter of fact, the customized memories on IOS are not looking exactly the same than the ones on MacOS. Is this just how it is or did i miss something to get the same customized memories also on Mac OS.