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.