There are several ways to transfer photos that are stored on an Android phone or tablet to a Mac, such as syncing via Dropbox or Google Drive.
There are some very nice Android phones (and a few bad ones too), and Google offers apps and web services that work on Macs, so although the two platforms are very different, they mostly get along OK. It may come as a shock to some people, but there are some Mac owners who actually prefer to have an Android phone over the iPhone. How can you browse the folders and files on an Android device and copy them to your Mac’s disk? Not every Apple Mac user has an iPhone or iPad and some people have an Android phone or tablet.
