Ignoring the drama, I'm not sure I understand. You want to know about Pixen for Pixen specifically, or you're looking for any useable pixel program on Mac?
If you're looking for a program with these things:
The features I want are OSX version, modern RGBA colors, assignable second mouse button (for secondary color, not something like context menu which I hate) and possibly a fast way to view a tile repeated many times (to check the seams).
Then try Aseprite which does have those things, and also a trial version.
If you want to know about specifically Pixen because you're interested in the features of all tools for mac to get feature ideas from, then... I can't help.