Zahorone/nsmb.conf

Last active July 25, 2026 15:14

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Fix for macOS 26 Tahoe Time Machine SMB backup failing with BACKUP_FAILED_DISCONNECTED_DISK_IMAGE error on Synology, QNAP, TrueNAS, UNAS. nsmb.conf configuration guide.

Raw

	[default]
	signing_required=yes
	streams=yes
	soft=yes
	dir_cache_max_cnt=0
	protocol_vers_map=6
	mc_prefer_wired=yes

quinmcclean commented Jun 18, 2026

Aaaaaand the issue has returned for me on 26.6 beta, and the solution that worked before for me is not now:

rm -rf'ing /Library/Preferences/com.apple.TimeMachine.plist

Gotta love a regressive bug like this. I will be installing macOS 27 Beta on one of my machines when it becomes available to developers and AppleSeed folks later this week and report back

Thank you! I am still having issues... would love to hear how you get on

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