A new version of the Mac operating system was recently released: 10.15 Catalina. If you've upgraded to this OS and you're using the Safari browser, you'll notice that currently it's unfortunately not possible to select and upload photos from your computer when creating some of our most popular products (photo books, calendars, cards, mugs, wall decor and phone cases.)
If this happens to you, we'd recommend that you upload your photos using our upload tool before you create your product. When you then return to your saved creation, or start creating the product again from scratch, you'll see that these photos are saved in your photo albums in the bottom of the page, and you can place them on your creation.
You can also use an alternative browser if you prefer, Mozilla Firefox or Google Chrome for example.