http://imagej.273.s1.nabble.com/Drag-and-drop-not-working-as-expected-on-Mac-tp5017500p5017503.html
> On Oct 28, 2016, at 1:12 PM, JonNathan <
[hidden email]> wrote:
>
> Hello,
>
> I'm having an issue where ImageJ does not open every selected file when I
> attempt to drag and drop multiple files at the same time. In other words,
> when I select in the Finder, say, 6 files, and drag the selected files all
> at once onto the ImageJ menu bar, only 4 will actually get opened. This
> worked fine until I updated ImageJ to 1.51h13. I've noted this behavior for
> .tif files (haven't checked other types).
>
> Mac OS 10.12.1
> JDK 1.8.0_111
> Mac Pro (late 2013), 16 GB RAM
I am not able to reproduce this problem. Perhaps you have run into the path randomization “feature" that Apple added to macOS 10.12 (Sierra). [1] You are experiencing path randomization if the “ImageJ home” path shown in the window opened by pressing “i” (Image>Show Info) starts with “/private”. You can disable path randomization by moving ImageJ.app out of the ImageJ folder and then copying it back. If the ImageJ folder is in /Applications you will need to hold down the alt key while dragging ImageJ.app out of the ImageJ folder.