Leo Kostizen wants to migrate from Aperture to Photos and use iCloud Photo Library. However, he’s worried that once he’s enabled the cloud-based photo syncing and storage system on all his iOS devices and his Mac that a deletion in one place deletes the items everywhere.
If a deletion is made on any device, the same picture is deleted on all devices connected to the cloud…What if I retain full-resolution pictures on my iMac? Will the deletion also be made here?
I can see a grandchild accidentally deleting a few pictures on iPad and me not even realizing that they are gone. I always keep a backup but it would be difficult to tell whether I need to restore.
Read more here:: If you delete a photo from iCloud Photo Library, is it gone forever?