Inspect an Active SMB Share Connection

Show protocol version, signing and connection details of mounted SMB shares with smbutil statshares.

macOSnetworksmbutilsmbLow risk

Run `smbutil statshares -a` while a share is mounted to see SMB_VERSION, signing and other per-share properties.

01Command

Command

$ smbutil statshares -a

02What it does

Slow NAS transfers are often explained here: an old negotiated SMB_VERSION, signing enabled, or encryption forced all cut throughput on older hardware. statshares lists one block per mounted share, so -a (all users' shares) covers every connection on the Mac. It reports state only — nothing is changed.

03Risk

RiskLow risk

RequirementsShows details only while an SMB share is mounted.

04Undo

✓No undo needed — this command does not change persistent state.

05Sources

smbutil(8) — the macOS SMB control utility (man page)
Manpagez (macOS man page mirror) · technical · 2026-09-17
Evidence: Documents `smbutil statshares [-a]` which prints the properties of each mounted SMB share, including SMB_VERSION and signing status.

Last verified: 2026-09-18 · Category: Network