Spyder's software is probably going to suck horribly, you should be using Dispcal GUI.
It's going to be sRGB (normal gamut) -- see post 5, here: http://www.notebookcheck.net/Review-Apple-MacBook-Pro-15-Retina-2-3-GHz-Mid-2012.78959.0.html
Backlight is LED, third post here: https://www.ifixit.com/Answers/View/190272/No+backlight+after+LCD+replacement
.. I ...
I just installed my old Spyder 3 Express on MacOS Sierra with Spyder3Express_4.0.10-1_Installer.
Installation works fine, the problem comes during internet product registration.
This is what I did:
1 - Disconnect from internet
2 - Run Spyder3Express installer
3 - choose a manual product registration
4 - enter the Spyder 3 serial number when asked
5 - the ...
Thank you for your answer. I investigated and searched a bit and came across the fact that colorimeter's filters can age, especially those with gelatin filters in the lower price segment (see http://www.color-management-guide.com/how-to-calibrate-monitor.html) So it becomes logical to me that Datacolor doesn't support older devices. Sad, but unavoidable :-(
Datacolor's knowledge base article for Spyder3Express seems like it hasn't been updated for 10.11. It lists
Minimum System Requirements
Mac OS X 10.6, 10.7, 10.8, 10.9, 10.10
Based on the list of OS versions, it looks like the list is updated for each version of the OS when they update the software. The lack of 10.11 (and the error message you're seeing) ...
If you want your monitor to show how the colors will appear in a properly calibrated print, then you need to set the white point to D50 (full spectrum centered at 5,000K) and view the monitor in a glare free environment with D50 lighting at around 2,000 lux. If the lighting environment in which you are viewing the monitor is different than D50, you should ...