Aatrix Software today announced that it has made version 16 of Top Pay, its payroll solution that links directly with QuickBooks Pro for Mac, available as a free download. QuickBooks Pro for Mac customers can access a free 90-day trial of the software from a link within QuickBooks. “Aatrix Top Pay is powerful payroll software designed by Mac users for Mac users. Top Pay combines an easy-to-use interface with an impressive set of features perfect for small businesses. Mac users can choose the features that fit. Small companies can keep things simple, while larger companies can take advantage of the more powerful features.”