Recently Apple released the latest update of macOS Monterey version 12.3. Since that version Apple removed the build in Python support. Unfortunately exporting geocaches to GGZ relies on a Python script that converts the GPX files to a GGZ file. This means that export to GGZ is not working anymore from this macOS update.
I looked for a short time solution (manually installing Python), but that did not work out. So I am now rewriting the export and replicate the steps that happened within the Python script in native (Swift) application code.
As you can imagine, that is not a few hours task, but quite big. So while I work on that, please don’t update to this latest macOS version if you rely on GGZ files in your workflow. I will update this article when the fixed update of iCaching goes out.
Sorry for the inconvenience.
Update: The version (10.2.1) with a fixed GGZ implementation is live