Photo setting is most compatible but HEIC won't convert to jpg

Exact same issue and when I "Save As" jpg to jpeg on the computer- the image is severely distorted.

Why does the settings say Most Compatible will be saved as jpeg but it saves as jpg?

So somehow Apple introduced a bug or removed the feature where HEIF and HEIC are converted to JPEG and MP4 when they are shared though apps. It would only keep the original Hxxx format if it knew it the recipient was another iPhone or Mac. I have a friend with an iPhone 15 PM who has this problem and we can not get it to automatically convert media just as my iPhone 14 PM does on 16.7.2. I'm leaning heavily towards this being a bug but there is very little information about it online and I'm afraid it's being overlooked by Apple.

Hi leonie.... just pointing out that on Aug 10, 2023 you said that if the compatible setting is on, all pics will be stored in jpg. Then on Jan 20,2024 you said the conversion only takes place if pics are being sent to a PC device that does not recognize HEIC. So you might want to clarify which format setting your in with regards to your Jan 20 remark. This whole situation reminds me of the movie 'Raising Arizona' during the bank robbery scene when John Godman says "Freeze!" then says "Lie Down!" and one of the older customers asks which is it....I can't lie down if I freeze? That being said, as we have found out, with iOS versions prior to 17.3, even with the compatibility setting on, our phones still stored pics in HEIC. Since I upgraded to 17.3, I can verify on my iPhone that three pictures I have taken after the upgrade and with the compatibility setting on, the three pics were all stored as jpg! So it would seem Apple has made progress here. My issue now is with the downloading to my PC.... I find it to be intermittent: sometimes not finding/downloading all my new pics; sometimes it will down load the pics in jpg but the PC says it can't recognize the format!? Yes, this could be an issue with the 'Photo' app that comes with windows (which I am still investigating) Note: it also happens on my wife's PC computer when she connects her iPhone. Therefore it takes us 5+ times of connecting and disconnecting the iPhone (via USB) to get all the pictures in. I still suspect this could be on Apple's end (with the 'new improved' iOS upgrades) since my previous iPhone and older iOS always performed 'rock solid' jpg pic & video transfers without a glitch. I hope Apple is aware that we are spending way too much time on this....where is their QA?? So it goes.....

You really have to force the iPhone to take the images and videos as JPEGs and H.264 and refrain from using HEIF at all on the iPhone or iPad, if you want to to be able to download them to other devices as JPEGs.

Apple seems to have changed the meaning of "Automatic" in the Settings > Photos > Download to Mac and PC on iOS17. Not just when downloading to Windows PCs, but also when downloading to a Mac. If the device we download to can handle HEIC, a HEIF file will not be converted when downloading it from the iPhone or iPad. It has the advantage, that the duplicate detection will no longer be disabled, as the converted JPEG versions could not be recognised as duplicates when downloading them. On previous system versions it could happen that the same images would be downloaded over and over again as new photos, because the converted file has not been an exact duplicate of the previously downloaded version. And we do not lose unnecessary quality by the conversion because of additional JPEG artefacts. We can be sure to download the photos in the original quality.

Thanks for continually investigating this, leonie .....

It confirms my previous deductions (experience) that Apple has broken the  ‘auto conversion’ program. One question: What exactly do you mean ‘….You really have to force the iPhone to take the images and videos as JPEGs and H.264….’ ? To my knowledge, the only method available (from previous discussions on this thread) is to change the iPhone Photo settings: go to Camera ==> Format (make sure that ‘Most Compatible’ has been selected (Note: I find that with every IOS upgrade, Apple seems to default your phone to 'High Efficiency'.... so you have to be diligent after every up grade to adjust your camera format setting back to 'Most Compatible'). Do you know of any other way to force pictures etc. to be stored a jpegs? Please share if you can.

Exactly as you wrote. Set the Camera to take the photos as JEPGs, with ‘Most Compatible’ and not with "High Efficiency". Once a photo has been taken as HEIC, Photos offers no tool to convert ti to JPEG while in Photos.

What about v17.3 that came out a couple days ago?

If not, then please tell Apple: Bug Reporting - Apple Developer and Product Feedback - Apple

transfer photos to files app on cell. then copy and paste them back to your photos. they SHOULD open up then as jpg. from within your photos