Preview can't save images with highlight annotation

Discussion in 'macOS High Sierra (10.13)' started by ignatius345, Apr 17, 2018.

  1. ignatius345, Apr 17, 2018
    Last edited: Apr 17, 2018

    ignatius345 macrumors 68000

    Aug 20, 2015
    I've come across this bug on both my Macs, and it seems pretty easy to reproduce. Is anybody else having this issue?

    1. In Preview, open a screenshot you've taken (or really any image).

    Screen Shot 2018-04-17 at 11.16.23 AM.png
    2. in the Markup Toolbar, select Shapes. Add a highlight mask to the image (bottom left item in the dropdown).

    Screen Shot 2018-04-17 at 11.16.28 AM.png Screen Shot 2018-04-17 at 11.16.44 AM.png
    3. Try to save the image -- you get an error that it "could not be saved". Other annotations (like the arrow and circle I used above) seem to cause no problems, but that shaded mask box triggers this bug. Even if you try to duplicate the image and/or save it in a different format besides PNG, it won't work. Unchecking "alpha" in the save dialog also doesn't help.

    Screen Shot 2018-04-17 at 11.16.48 AM.png

    Seems like a pretty egregious bug for a high-profile MacOS app like Preview.
  2. prisstratton macrumors 6502a


    Dec 20, 2011
    Winnipeg, Manitoba, Canada
    I had not noticed this until you brought it up, but as you say, it is very easy to duplicate. Maybe you should report this through official channels.

    I typically use Skitch (older version 1.0.12) to annotate my screen captures.
  3. ignatius345 thread starter macrumors 68000

    Aug 20, 2015
    Yeah, I sent feedback through Apple's page. Generally Preview works for what I need -- or has until now.

    I sure hope the next MacOS release is more focused on fixing bugs...

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