TL;DR: looking for FileProvider Extension debugging suggestions... I am attempting to develop NSFileProviderReplicatedExtension. Against a real backing repository (~4TB), I've seen fileproviderd become heavily loaded, non-responsive (i.e. fileproviderctl dump has failed to complete within 60s on 8 tries) and (maybe?) re-enumerate the contents of the repository. The profiler says that it's spending most of its time doing sqlite work against the table for the domain from my extension. I hypothesize that my extension has telling fileproviderd occasionally inconsistent things and it is now making sure that the world is the way that it should be. So: is there a way to get it to log when it has received invalid info? (I did read its (terse 😊) man page. I'm running out of ideas of what more to check with responses from the extension.

tl;dr I'm trying to get the FruitBasket demo to operate (Synchronizing files using file provider extensions | Apple Developer Documentation) on Sonoma 14.1.2. I'm probably being stupid about something but It doesn't work as I expect so would welcome any suggestions. Details I downloaded the FruitBasket demo code I attempted to carefully follow the README and replace all instances of group.com.example.apple-samplecode.FruitBasket I built and ran and created a domain My new domain appears in the Finder side-bar. It appears as a directory in ~Library/CloudStorage/. But attempting to (e.g.) ls ~/Library/CloudStorage/* gives me an ETIMEDOUT error and the Finder says something similar. Things that I observed: once a domain exists, there is indeed a Provider executable running. it never generates any log messages attaching the Xcode debugger to it and setting some seemingly likely to be invoked breakpoints (e.g. Extension.Extension.enumerator) never hit the breakpoints. my naïve take on the disassembly when pausing it suggests that it's waiting for incoming Mach messages. (That seemed sensible.) FruitBasket starts with an error: Couldn't read values in CFPrefsPlistSource<0x6000039853b0> (Domain group.org.liqui.apple-samplecode.FruitBasket, User: kCFPreferencesAnyUser, ByHost: Yes, Container: (null), Contents Need Refresh: Yes): Using kCFPreferencesAnyUser with a container is only allowed for System Containers, detaching from cfprefsd Questions Does the above error suggest that I have set the group value wrong somewhere? Maybe Extension+Servicing.swift:21 defining the NSFileProviderServiceName("com.example.FruitService") is mismatched somewhere?