why a expensive nMBP for 4k-Monitors ?
hello, just a few words from another non-professional photographer with lots of data (raw about 40 MB):
a new laptop for after processing on a 4k-Monitor does not make a lot of sense.
Why:
1) A used MacPro at home will give you much more resources, because the MacPro is upgradeable as you like (Designed in times, where apple was still helpful to its customers, yes, a long time ago..)
2) It will give you redundancy: a powerful second machine.
3) You will spare lots of money.
4) You have a lot of HD-bays for backup.
OSX 10.8.5 is ok, 10.9 also.
example:
You buy a used MAcPro 2009-2010 8-core.
You install the apple-firmware to switch the machine from being 4.1 to 5.1 (cost: ZERO USD)
What you need: lots of Memory. Nowadays 6x 8 GB is really cheap.
Start with the memory of the purchased machine, if budget ok:
get the 1333 MHz Memory, it will work with the 4.1 firmware as with the 5.1 firmware, but your MP will be faster with the latter one, once installed. (6x8 GB 1333Hz = 48 GB (!!) for 450 USD) installation easy+++
A USB-3-Card with 4-6 ports from Sonnet or Inateck costs nothing more than 25 USD - installation easy +++ (Important for rapid uploading from your memory card)
As for performance, you can get a PCIe-Module for SSDs from OWC or from Sonnet (Tempo) - you can install every SSD you want to (sounds nowadays unreal for apple clients) - if your budget still allows (roundabout 200 USD).
installation easy+++
samsung 850 1 TB pro is the best - budget: Samsung 840 evo 1TB (300 USD)
Finally you need a GPU easily handling the 4k-Monitor. (300-1000 USD)
have a look at MAcVidCards or just buy a Nvidia GPU capable of handling a 4K-Monitor, but install the proper Nvidia-Firmware before on your MacPro.
The GPU is the only thing to think about a little bit more.
I really recommend to have a look at this thread:
https://forums.macrumors.com/threads/1440150/
Now you have a machine to fly through your photo/videodata
. much more faster and more safe than with a soldered/glued rMBP
having NO chance to adapt your system any more...
and you have 4 (FOUR) 3,5" bays (also fits for 2,5" HDD) to install easily just up to 8 TB in the machine and you can connect lots of external HD with your
photo-library
I love my upgraded MacPro a lot - bought an expensive hi-resolution SemiPro-Monitor some years ago and was very pleased - even with the old GT120-Card.
Soon I will purchase a modern GPU Card for my MacPro and a 4-k-Monitor for this rapid machine..
BTW: I own the last good MBP for photographers: a MBP 2011 - which was then purchased with the (at that time) "hi-resolution" 1680x1058 Screen - anti-reflex. Since 2012 they sell only MBP with make-up-Mirrors full of reflections