Collapsing file groups in Mac finder
None of the groupings allows you to collapse/expand folder in List view. So to facilitate quick grouping, (I forgot defaults) go to View menu -&gt; customise toolbar and include the  icon in toolbar.

You can group by None and then later set Sort by to Kind. It will not allow &quot;Kind&quot; groups to be collapsed, but allows the same for folders, at least.

After your edit, I am prompted to suggest the Icon view and Group by Kind. It has collapse and expand groups of a particular kind.