I am still working on the refinement of the GIMP 2.9.x AppImage package, trying not only to improve compatibility with all kinds of Linux distributions, but also to support all the GIMP features.
One thing that was missing in previous versions of the AppImage was support for python-based plug-ins. So recently I’ve been working to include the python interpreter and support files into the AppImage bundle, such that GIMP can use it for its plug-ins.
The first AppImage package with python support can be found here. It should allow to run any python plug-in that works with the standard (non-AppImage) GIMP 2.9.x versions. On the other hand, support for the RAW loading plug-ins is still likely broken and needs some further work. Note that you do not need python installed in your system, as it is included in the AppImage itself.
I’d really appreciate if as many users as possible could test this appimage and give me feedback, both positive and negative, on wether it runs properly and wether plug-ins work or not…