I travel frequently with my company laptop. Its a Dell 😱 so if it can handle it, so can your MBP 😀 Anyways, they will ask you to take it out of the bag, but I have not been asked to boot it up since last summer as they usually use the "magic wand" over the laptop ("sniffs" for explosives/chemicals). But, this will depend on the airport.
Just please remember, even though you make it through security, laptops, bags and other gadgets still go "missing" in the secured areas. So, keep a close eye on your laptop.