Originally Posted By: kevs
Joe, I was thinking of photos, not libraries. I'm not even aware there is a library? Where is this library, and why would a library be such a big file (unless that included images).
in this case the Library is a special type of folder or package containing index files, several folders for specific purposes and if burrow down far enough, every image contained in Photos. It is named Photos Library and located in the ~/Pictures folder (where ~/ indicates your home folder). To view the individual folders and files within the Photos Library Control+Click on the Library and in the drop down menu that appears select "Show Package Contents". WARNING; you should NOT do anything to the contents of the Photos Library package or you risk damaging the structure and destroying the Library. If you want to manipulate the images in any way do so using the Photos app.
Originally Posted By: kevs
1) Is there a way to quickly select contiguous images fast on non phone platforms? And if not then just do it with the swipe trick on the phone?
2) And whatever you do anywhere, should reflect later upon all other places?

It is NOT a question of phone or non-phone platforms, rather MacOS or iOS devices. Any group selection tool available anywhere in MacOS will work in Photos on MacOS including:
  1. click on the first image of a group then Shift+Click on the last image in the group
  2. Click and drag a rectangle around a block of images you wish to select as a group
  3. Select non-contiguous images by holding the Command (⌘) key and clicking on the desired images
  4. Select a contiguus grpup of images using option 1 or 2 then select-out any unwanted images in the group using Command+Click
The "Swipe Trick" only works in Photos on iOS devices such as the iPhone and iPad. Photos on iCloud is intentionally neither MacOS or iOS it is designed to work on any computing device with a browser capable of HTML, CSS, and JavaScript which limits iCloud Photos' capabilities.


If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein