I am working through Cloud Custodian docs and noticed a few things to consider. Sorry if this isn't the right forum for such input, I am new to this whole thing. I am coming at this from beginner mindset.
Mac
Windows
You have to install python3 from the windows store, or edit your variable $PATH.
Also my super noob move, you have to change the "Set-ExecutionPolicy -ExecutionPolicy bypass" to get it work if your not signing the PowerShell.
If this wasn't helpful enjoy some cloud custodian art.