[yonran]

I ran into this issue too since I implemented an --rsh wrapper script (based on https://github.com/kubernetes/kubernetes/issues/13776) and the options passed to ssh are different (samba rsync passes in -l user host command, openrsync passes in user@host command).

> openrsync accepts only a subset of rsync’s command line arguments.

I have not upgraded to MacOS Sequoia yet so I cannot verify but from the source (https://github.com/apple-oss-distributions/rsync/blob/rsync-...) it appears that there is a wrapper and they ship both samba rsync and openrsync and fall back to samba if you use an unsupported option?

[stephenr]

Interestingly, I see evidence of that wrapper on my Sonoma machine, but `/usr/libexec/rsync/` only contains the `rsync.samba` binary,

On my Sequoia machines, there is no `/usr/libexec/rsync`, and the `rsync` binary at /usr/bin seems to just be the regular `openrsync` binary.