Thank you for the answer, Quinn! As suggested, I opened tickets via Feedback Assistant. Here are the IDs and links for reference: FB9126200 (NSFileProviderReplicatedExtension does not allow to read/download partial file) FB9126221 (NSFileProviderReplicatedExtension enumerators limit its use cases as replacement for "real" VFSs)

As a already wrote: I e.g. use this function in a loop. Memory is not released.

I found this example, which looks promising: https://github.com/peterthomashorn/macosfileproviderexample/tree/main

Still, having an example how to use the new NSFileProviderReplicatedExtension would really be helpful. As long as Apple does not provide an official sample code, @Laszlo, @sssddgg could you maybe post your code here as a starting point for other developers? Thanks a lot!