Can you advise me please the best and "proper" way to install (inject) my part of xml on Mac OS please?
In the best occasion - by Apple Script.
At this moment I made C++ based .exe installer, who reading the AE placement from Windows' registry and injecting a part of .xml text inside of PresetEffects.xml in folder .../Adobe After Effects CC/Support Files/
I would do similar in Mac now...
Thank you in advance!
This is not a supported feature. Yes, I'm aware that some people have hacked together ways of editing this file, but it is not a recommended, supported, and tested workflow.
Thank you, Todd!
But is it possible to create and to add the own Custom Effects on Mac by hands?
When I say that a feature is "not supported", I mean that neither I nor any other Adobe person should be assisting you in doing this. Modifying the preset effects XML file is not something that users are supposed to do. It is untested, unsupported, undocumented, and not recommended.