Cropping / rotating a TIFF in Preview.app damages image

I have not experienced this issue but would like to test it on my end if possible, is this an image i could download somewhere?

If this issue has been haunting you for a while spanned over a few OS X versions i'd think the original problem has been migrated along with all the upgrades but this theory kind of goes out the window as it happens on another Mac as well. (unless that had the same issue and migration pattern).

Exact same issues here. Even photoshop messes up the file even when saved to jpg or other formats after it's been edited. While i currently do no have a solution, i can tell you you're not going crazy 😉 I'll keep testing and will post if i have an update. perhaps someone else will come along with suggestions in the mean time.

Download and try Xee³. It does lossless rotations, flips among other editing features. If you want the older, free verson get it here: Xee V2

OT

Open the document in Preview, then go to the menu Tools > Assign Profile:

and Assign ColorSync Profile to Image as Black & White:

and click OK.

Now rotate and crop your image and store it.

See if this helps.

MtD

While B&W what not an available option for me, i did have Generic Grey Profile available. Set it, cropped and rotated, saved... it did the trick for me. Great tip. Hope it works for the OP as well 🙂

Behold: https://www.apple.com/feedback/🙂

Ah gotcha. I don't know about that but it could help. Still, the feedback ends up somewhere... can't hurt.

I had a similar issue. I rotated my images in Preview on the Computer I used for scanning the negatives in TIFF format. For some reason they were not displayed anymore in Preview, but I could still view them by pressing space from the Finder. I noticed that they were translucent, but I didn't think much about it. The computer was running an older version, 10.6.8, so I figured it is a bug and everything will be fine at home on the newer version.

As soon as I came home and wanted to have a look at my photos, I still wasn't able to view them. I found this discussion but the proposed fix did not do the trick. I went back to Digital Photo Lab from our university where I scanned the Photos. I wanted to revert the photos to the original but the option was grayed out (On some other thread this was possible for some people). So I applied the "Black and White" color profile again and chose "Save As" - an option I did not have at home (different versions). The prompt included a tick "Include Alpha", ticked by default. I unticked it, saved under a different file name et voilà! I got my photos back!

Apparently it was the alpha channel that was screwed up. Also explains why the photos were translucent with the Space-Preview from Finder. Also, this made the files significantly smaller - probably half the size if I'm not mistaken. I'm just super happy I got my photos back and don't have to scan them again!

Hope this helps somebody else!

Best

Tim