Sometimes for reasons beyond my understanding: I've seen many people bent over a 15" MB playing with MRI images in matlab/spm/... It's hard imagining something with worse posture, less ergonomics and less efficient.

mac has word, osirix and freesurfer etc but I agree about posture

Not sure why you get downvoted for what is imo an ok reply? Only Osirix is strictly OSX and even though I haven't used it I'm pretty sure there are viable linux/windows alternatives for that and the other software you mention. Anyway, next time I see someone in a situation as I pictured I'll just ask why they chose the Macbook

Osirix is the only FDA approved software of its kind (MRI, 3D reconstruction, database), as far as I know.

Mac is the only platform where you can run freesurfer and word natively.

I didn't notice the downvotes..