I use Truembroidery software on my Mac. I got it with my Pfaff embroidery machine as part of a package. It is very expensive to purchase by itself. Most owners and employees of quilt shops will run and hide when you mention you own a Mac. The software is necessary if you want to digitize your own designs but you can get by without it. I download designs off the internet to my Mac and transfer them to a usb stick that goes in the embroidery machine. Just be sure that the design you download is in the proper format for your machine. Most designs are offered in multiple formats. I can hook my laptop directly to the embroidery machine but I just use the usb stick instead. If your Mac has Bootcamp, you can run Windows on it or you can purchase Parallels and use it to run Windows. It really helps if the shop you buy from offers classes on whatever machine you buy. I have taken 4 classes and will take more.

TruEmbroidery™ Software for Mac - Professional Embroidery Software