Listview smallimages are not displayed.
I don't work on Mac... But checking in the OI: SmallImages is listed as restricted for Mac and Qt.
That means, it's known not to work, and it's unknown if it can (or will) be implemented.
Please keep in mind that not all team members are visiting the forum. You can additionally try to get feedback on the mail list.
However seen that the issues were "updated" (pinged) last month, it seems that no one with sufficient knowledge has enough time right now.