Thank you for telling me about that trick.
Actually I think this should be exposed in the GUI per Path "Scan inivibles" or not. This is what I was searching

I applied the setting and added the two rules from the screens here:
1. Recurse the folder:
http://d.pr/i/VUs92. Trash .DS_Store files:
http://d.pr/i/GyyjThat does what I want but seems to create to much overhead to be usable for me. There are thousands of files and folders in the sub folders of my .rdbackup folder and checking the log hazel is scanning for minutes till it is through all of them.
Is there something I could do to optimize this?
The "Date Added is after Date Last Matched" will not help me as far as I understand how that works.
Actually I wonder if there could be an action which just triggers for newly created files in a sub path. Kinda like the App "Trickster" finds it files and then applying rules on it when they match. Was that being considered already for Hazel?
Just read about FSEvents (
https://developer.apple.com/library/mac ... rence.html) and believe that could work for Hazel... or do I miss something?