Usually, there are dedicated applications to view different types of files. However, if you are looking for a viewer that lets you view files of multiple types, you have landed on the correct article.

Jim Z: yes, they display correctly in irfanview - just not in Photos app; i was doing a demo/presentation at the time, and didn't have irfanview installed (didn't think i needed it) and assumed ...

You can convert HEIC files to JPG on your Mac using the Preview app. High Efficiency Image Container (HEIC) files are a relatively new format for images, videos, and multimedia said to have smaller ...