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There should be a tab named 'Previous Versions' from there; which will allow you to see the versions that are available in snapshots.
It is also possible to browse the snapshots directly. Make sure that you have the address bar visible (which shows the current directory path). If the address bar is not visible, select the "View" menu, select "Toolbars", and the select "Address Bar". Navigate to the base of the share, then add '\.zfs\snapshot' to the current path in the address bar, and press enter.
If the share has been mapped, the base of the share should be the drive letter you mapped it to. This navigates to the hidden folder where snapshots are stored, so you can browse the state of the share at the time of the snapshots. Most of these snapshots will include the date the snapshot was taken in their name.
Note that the date modified does not always match the date of the snapshot. Instead, it should match the date modified at the time of the snapshot.
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The only way to access snapshots on Mac OS X is to navigate to the hidden snapshot folder. This folder is visible over NFS or SMB/CIFS. From the terminal, simply navigate to the base of the share, and to .zfs/snapshot under that. For home accounts, ~/ is the base of the share, so ~/.zfs/snapshot is the snapshot directory. From finder, navigate to the base of the share, and then use the "Go to folder" command (Cmd+Shift+G or select "Go to folder" from the "Go" menu)
and enter ".zfs/snapshot".
Most of these snapshots will include the date the snapshot was taken in their name.
Note that the date modified does not always match the date of the snapshot. Instead, it should match the date modified at the time of the snapshot.
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