Glitch in Photos when cropping in edit mode (Macbook Pro)

When i import the original .NEF or .DNG they are damaged by cropping. When you revert to original, they are not damaged anymore. All the damage, corruption, distortion....is coming after cropping in PHOTOS only. If you import and edit no damage. If you export original file undamaged. If you export the cropped, corrupt version, yes you get what you see.

Yes, the one on the right hand side. If edited in Affinity Photo and On1 Raw, same result. If saved as .JPG or TIFF, same result. I will edit now in Aperture, export as .JPG and import into PHOTOS and crop and see what happens. Stand by for result.

Very good question Léonie but unfortunately not a helpful answer. If you export out of photos the cropped/corrupted .JPG, that is the way the image is now and it will import and open in Aperture or iPhoto accordingly (corrupted). If you choose the export option to export the original unedited image you will get the correct and uncorrupted image and be back where you started so to speak. A possible answer is, edit and prepare image in Ps or whatever, including final crop and just catalogue in Photos which I prefer/find easier to use than Lr but excuse me, is that what i paid $4500+ for? A machine/software/integrated system that doesn't work. Added to that, due to this experience paradoxically i've found that Photos actually is not a bad RAW image editor at all, actually quite good, if completely manual and lacking layers and other Pro tools of ofcourse!

If you choose the export option to export the original unedited image you will get the correct and uncorrupted image and be back where you started so to speak.

And can other editors still edit the originals exported from Photos, or did something happen to the originals while in Photos?

Léonie. Once you crop the original image and it becomes corrupted, you can in every case, even if you need to try several times, revert back to original as it was originally imported into Photos. If you then export out of Photos as original, the image is 100% ok.

if you need to try several times, revert back to original as it was originally imported into Photos. If you then export out of Photos as original, the image is 100% ok.

I just wanted a confirmation, if you have tested to export the originals and then to edit the exported version in other applications and if it was still ok.

What I am trying to find out, if the original in the Photos library is becoming corrupted by Photos. When you edit the photo, it reads the original. If we see a corruption after editing, we do not know, if the original has become corrupted or photos is processing the original incorrectly. Photos does not modify the originals ever, but they can become corrupted nevertheless by being stored on bad disk blocks or when a drive starts to fail.

I have tested them on 2 other Macs, no issues encountered in PHOTOS on the other machines.

With the same system version?

It may be a hardware problem or you installed something that is incompatible and causing problems.

You may compare the third-party apps you installed on your Mac to the other two Macs.

My Retailer says they have presented the issue to Apple engineers. I have had no response so far. The problems only occur in PHOTOS. The problems occur with edited images brought into PHOTOS as well as with native .DNG and .NEF files edited in PHOTOS. The problems are random and intermittent. IMO I believe the problem is with PHOTOS or how PHOTOS is interacting with the hardware on this particular machine. I don't no of any other way to explain it? All tests of graphic cards and CPU reading and writing show everything is working well. The only problems are when working in PHOTOS and Photos is critical to the entire system architecture and cannot be deleted. All software is always fully updated.

By the way, even though i've mentioned it many times before, the moment you click revert to original, ring the uncrossed image or the unedited image whatever, the image does return to it's original uncorrupted state.

Yup. Have an open case with Apple tech support, pushing six weeks now. Stumped everyone with this. Picked up Polarr (correct spelling) Photo Editor Lite for free at the App Store. Does a nice job with straighten and crop. rk_apple, what retailer did you get yor machine from? Mine came from B&H Photo.

To me this doesn't only happen when cropping / editing images, Even right after import from camera some of the previews show this behaviour. Exporting normally (not unedited images) will write the corrupt image to disk.

Any ideas?

Please excuse my silence, I had to change my user name, seems my original user name might be blocked from contributing further to this thread. Cannot access using my original name. After many more hours working on the issue, the problem has become worse, not better. The display now randomly flashes like lightening and in addition I have a B key that doesn't function properly, either strikes blank or multiple repeats.

I have the same problem. My configuration is:

iMac (Retina, 27" display)

8GB memory

OS: macOS Sierra 10.12.5

Source of photos: Canon multifunction "Imageclass D530 (printer/scanner).

I have scanned multiple photos into the Photos app. When I tried to use the Photos "markup" extension, after several successful markups, I began seeing the same kinds of results that you are dealing with. Very strange "collages," for lack of a better word, featuring parts of the photo I had just cropped typically against a bright red or yellow background.

These problems occurred using other editing functions available in the markup extension besides cropping. I tried the "Enhance," "Rotate," and "Text" functions individually and, once the failure started occurring, got the same weird results each time.

The problem is seen in some cases immediately before hitting the "DONE" button and, in other cases, after hitting the "DONE" button. The edited photo might look right, but upon displaying in another album, say "Last Import," it shows as corrupted.

Nelson R. Kent

I have this exact same problem. MacBook Pro (Early 2013) running macOS Sierra 10.12.5.

Picture scanned from Cannon MG5520. When I crop in Photos, it looks fine initially, but the saved copy (and any subsequent exports) shows duplicate portions of the same photo -- essentially looks like the same photo is stacked on top of itself.