Hi,
I'm testing HEIC images support for a PC (Windows) in PTE AV Studio right now. If all is OK, we'll add it for V12 soon.
It was not easy to support this tricky format! Interesting fact, a typical HEIC image file from your iPhone contains a grid of 48 small video fragments (4 x 8 tiles - 512 x 512 pixels short video clips which contain 1 frame, still picture) + meta data (rotation, color profile, thumbnail picture).
I discoverd that even latest IrfanView cannot display correctly colors in HEIC images, colors are distorted slightly.