There is no such thing as Microsoft Office 2006 for Mac. Microsoft Office for Mac exists as versions 2004, 2008, 2011 and 2016 (aka Office 365).

Regardless of which Mac version you mean, you will have to completely redo your form and its VBA code as Content Controls do not work on Mac versions 2004, 2008 & 2011 (Active-X controls do not work on any Mac version). You will need to use formfields instead. Do note, too, that Word 2008 does not support macros.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]