I've been searching for a free Mac OS X image exif / metadata editing tool, with a GUI, but didn't find any.
I did find a python/pySide Qt4 tool called pyExofToolGUI by hvdwolf which should work on OS-X, not having a Mac I can't be 100% sure, I did find that for Windows 10 a little work was needed to get it running and will be posting my changes up later if anybody is interested.
- Free Gratis & Open Source
- Cross Platform
- Thumbnail display
- Looks to give access to most, if not all, of the ExifTool functionality
- Displays the readable data from supported formats
- Can bulk edit of some writable data
- You can add your own ExifTool commands
Edit GPS Block
Edit Exif Block
The above screenshots were taken on Windows 10 after a few tweeks to get it running, using Python 2.7.11 - I was unable to test under Python 3 as my current installation is Python 3.5.1 and PySide does not at the time of writing support > Python 3.4.x
For any windows users having issues I have committed the changes that it took to get things working for me, (Windows 10 Python 2.7.11), to https://github.com/GadgetSteve/pyExifToolGUI and have raised a pull request on the original. Update - Pull request has been accepted.