[KevinH]

No ideas here at all. On macOS, I always directly edit the plugin.py (or whatever py file I am debugging) inside my local Library/Application Support/sigil-ebook/sigil/plugins/MYPLUGINFOLDER/ and save it.

I just make sure to always close completely out of the Sigil Plugin Runner dialog first before editing anything.

I have never needed to change versions in plugin.xml file or reinstall.

I keep Sigil open and running with a test epub while doing this. I can repeatedly launch the plugin and get my output in the Sigil Plugin Runner console (as long as I change plugin.py to return a -1 indicating error always until fully debugged).

So very fast: "run - see output or errors - modify - run" cycles are possible.