I'm using the MDR 1A with my Xperia Z3. That being said, as far as mobile devices go (without the use of a portable amp), I've only also tested them with the iPhone 6 Plus. I don't know how different the audio internals of the iPhone 6 Plus is from the iPhone 5, but assuming they are somewhat the same, it's adequate enough.
As far as Xperia Z3 vs iPhone 6 Plus go, the MDR 1A shines on the Z3. That's not to say the 6 Plus can't squeeze some butter out of them, it actually sounds about 10% louder on the iPhone 6 Plus, but these are high quality (High Res) headphones, and the Z3 has a special dac that is High Res certified. What that translates in, according to my extensive comparison between how the Z3 and my friend's iP 6 Plus sound (with these headphones), is that the Z3 squeezes quite a bit more detail, more tight bass, and the biggest difference is that on the Z3 the soundstage is significantly increased.
However I must say they sound very good on the 6 Plus as well.
As far as the Macbook goes, Macbooks usually have good soundcards compared to other notebooks, so I think it will sound quite good.