The designs will not show up on a MAC or any other computer unless you have embroidery software. You will be able to see the designs, like an icon but not the actual stitch file that your machine will need. Machine embroidery designs come in many formats, PES is commonly used for Brother and Babylock. So a PES stitch file will show up on your MAC computer as a black square. You won't see the actual design and you can't edit it without embroidery software. You can transfer it to a USB and get it to the machine that way. However, I have not had any luck with that working. The machine would not read the file. Inexpensive software for Mac is Embrillance, it's sold in modules and you can buy just the part you need. Embrillance also works on Windows computers. Embird is another inexpensive software sold in modules, it is for Windows computers only. It can be used on a MAC if you run Parallels or other software to partition your hard drive to make one side emulate Windows.