Now
there's an amusing image
I tend to agree - and I'm not even a Mac person. I have always noticed (in showrooms), that Mac screens are usually excellent and assumed they are IPS variety which "don't do that".
Most laptop screens are
not IPS and are consequently very tricky to 'safely' use for photo editing, you
must get perpendicular to them both for setting up and subsequent use. Up/down/tilt angle affects brightness horrendously, left/right may affect colour.
I supposed that Mac 'laptop' ones were IPS and didn't/shouldn't exhibit this behaviour.