Converting HEIC file to a jpeg

is you are having HEIC files in your Photos Library, you can also export them from Photos directly as JPEGs, if you are using macOS 10.13 or newer. Older system versions do not support HEIC at all. Then you vcan use the online converter at ‎heictojpg.com .

Open Photos and select the image, then go to File > Export... (or use the keyboard shortcut COMMAND+SHIFT+E) in order to export the image as JPEG, TIFF or PNG🖼Have a Merry Christmas!

Export to .jpg with Preview.