Tvir

Thanks for all the comments! I'll come back as soon as possible. Regards, Tvir

I reply to myself, as - after searching and experimenting this and that during several days - I found today the reason to my problem... Should I tell that, as I haven't got any comments from you, the community? Ok, jokes apart. THE point is that the option Auto update custom settings under Image quality settings needs to be ENABLED! Well, as the manual is so obscure, not specific, with too short explanations and too general, I needed some 1-2 weeks (of course not day and night to find the solution. Anyway, now my X-T50's ISO setting holds, to that I set it. By the way, the camera with the quality of the pictures, is great!!!! I love X-T50 after my reliable Nikon. Well, one more thing, I would like this working: I transfer pictures to my Mac by using the app Photo transfer by wire because it is hazardous to take the memory card from the camera and put it to my MacBookPro because after Mac's reading the X-T50 doesn't recognise it any more!! Nothing but formatting the card *in my Nikon* helps, to get X-T50 to work with the card. So are there for this second issue any solutions??

I guess but I'm not definitely sure if this happened after the latest firmware update, or irrespective of that. Anyway, as the manual says the chosen ISO setting should stay chosen, not resetting, after the camera is shut down. AND this was the case previously. But now it isn't. So, every time I shut the camera the ISO setting turns back to the default value I've chosen, for example 500 ASA even though it was something else when I took photos. I don't find a way to fix this. Hints?

That's sad if one needs to use jpg files to work with x-t50 pictures on Mac Photos, as they are much bigger than heic files.

OK, interesting. - Are there any drawbacks for using the formatting with the app? As it happened to me (you can read above) that the card became unusable (until I found a way to get it functional again), is there any "guarantee" that formatting with the app can prevent the problem? The problem arouse after reading the card in my MacBook Pro. Can I let my Mac to read the card without having the card corrupted? Can there be other reasons explaining the corruption of the card? I ask this because having a camera with just one card holder there is no any backup if the card gets broken.

Further comment, I've kept the card in the camera and transferred the photos by wire, and I've met no problems. Nice.

I liked to know if there is any wider knowledge on the functionality of heic/heif files created by Fujifilm cameras on the Mac Photos app. The point is that heic files created by iPhone open fast with Mac Photos but those created by x-t50 need some 6-7 sec to get rendered fully. That makes the use of heic files created by x-t50 bad. As pointed out above, the files created by iPhone do open fast, perhaps slightly slower than jpg files but anyway fast enough. What's interesting, the Fujifilm heic files do open fast when opened at Finder, "the system level". So, my conclusion is that the delay in rendering Fujifilm heic files is related to the performance of the Photos app. Comments? And is there any remedy for this drawback???

This is very interesting! I never found a situation like this with Nikon. - Now I've been formatting, taking a few pictures, and formatting again, several times, to see if the problem appears. No, by this time. By now, I think I don't take the card out of X-T50 but transfer the taken pictures by a cable. And then format the card. If there will be problems, I'll let you know!

It happened that after transferring photos from my new X-T50's SD card (formatted in the camera) attached to MacBook Pro, the card put back to the camera launched a message of a card error (or similar). Before using the card (Sandisk) in X-T50 I used it in Nikon D7100, without problems. Strangely enough, it was not possible to format the card in X-T50 (another error message). However, another Sandisk card appeared to work in X-T50 well. Then, I put the card with the error message back to Nikon and formatted it there successfully: It was possible to take pictures with Nikon. Surprised of this, I took the card back to X-T50 - and was able to format it! And I also took pictures without problems! Can anyone tell me what is this? As there are only one slot in X-T-50, this behaviour makes me nervous. Unfortunately, I cannot remember exactly but I had previously a problem of a similar kind, and I think it was associated with using the card in MBP, as now! Can an SD card be corrupted in Mac, although I just transferred pictures from it?? Perhaps it is safer to transfer pictures from X-T50 with a cable. Comments welcome!