Mac laptops/ computers are specifically from the Apple company. Like Kayla said, they will have the logo on it. They are significantly more expensive than your regular PC. PC is any other laptop, whether it be Gateway, Acer, Sony, HP, etc.Often if you do any sort of digital art work like film editing, 3d graphics, a Mac would be a good choice.
Mac computers will have the apple logo on it, pc computers won't, they'll just have whatever brand logo on it for example Dell computers have the word "Dell" on them.