I use a Mac (2014 15") and often use a cooling fan underneath it if I'm doing lots of processing.
My previous Mac, sorry can't remember what model, was eventually replaced for free by Apple after 5 motherboard replacements. Before that I had a Dell which also had to have a motherboard replaced, so it's not just an Apple thing. I think it's a hazard of so many components in a small space.
As a precaution I almost always use the cooling fan when processing photos or videos. I don't want to risk it... and have had no motherboard replacements for several years now.