Why .HEIC Suffix is Uppercase or Lowercase

airdropheiciosiphonemacos

I just took five pictures on an iPhone 11 and then Airdropped them to my Mac Mini. I noticed that every other image has the file extension .HEIC in uppercase.

I am pretty sure that I have noticed this before, only just today thought to ask about it. Does anyone have any idea why this might be?

some images that I Airdropped

Best Answer

There is no functional difference, it's solely down to the programming decisions of the originating program. Some choose to do it fully uppercase, some do not.