If you don't have a phone, there is another way, although the results are always as reliable as the app. But, I don't know if you can use Google on a Mac. Can you? If so, when you upload a photo to any online site like Medium, right click on the image and a list will appear. Midway down the list you will see "Search images with Google lens" - click on that. Google will search the image and give you suggestions of what it is.