Develop a Mac Application

I run a small consulting business, part of which involves chairing lots of meetings. A consultant I work with me installed a macro and template on my windows PC which automates the distribution of task reminders and copies of minutes. I have just replaced my windows laptop with a mac and of course have discovered the macro does not run. I would like to replicate the automated work stream on my mac either by updating (if this is the right expression) the macro to run on word for mac or by creating an application that has the same functionality. I have enclosed the template for reference. I have a few other little jobs which are similar however this is the urgent one.