I guess the custom officers heard that gift story a thousand times.
They know their stuff.
With the current exchange rates they are on alert for those things.
of course they dont want a receipt for every little thing.
but a high end device like a macbook pro.
They will surely want to see some proof.
This is nonsense.
Why would they even stop you? On the off chance that you're one of the tiny number of people who bought a laptop while they were away?
No, they'll not want proof. Talk about paranoia!
Business travellers, everyday travellers, everybody travels with a laptop these days, often expensive DSLRs and lenses, and a ton of other accoutrements. They are not 'on alert' for somebody bringing home a macbook pro.