The place where Poser puts its preferences in macOS (returned by poser.PrefsLocation() ) returns "/Users/[USERNAME]/Library/Application Support/Poser Pro/11". As you can see from the "Application Support" folder name, this is entirely equivalent to the Windows concept of AppData.

Again, I say. "Just use poser.PrefsLocation()!" If you don't like it being associated with Poser, because you want it for application data sharing, though if Poser weren't one of the apps you're sharing data between, that would be the sole reason I could imagine for not putting it there, as I suggested in the other thread, put your subfolder within the parent of the parent of poser.PrefsLocation(), or ~/Library/Application Support/Somewhere Nobody Will Ever Look But Can Always Write To. ;-)

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My ShareCG Stuff

Verbosity: Profusely promulgating Graham's number epics of complete and utter verbiage by the metric monkey barrel.