Wow!
In r62628 I committed a version of TChartListbox in which the ThemesEnabled check has been removed, too. It should work now.
Could you finally test also the attached modified demo in which two paintboxes with checkboxes are compared again: in the left paintbox the ThemesEnabled is NOT checked while it IS checked in the right paintbox. On Windows, the checkboxes are painted in both, but on the Mac only the left checkbox should appear with the current bug.