Can I assume you wish to use an instrument? If so, I can't think of any software off hand that will do this but it's certainly possible. Most of the products I can think of will ask for some calibration aim point first which you wish to avoid. Doesn't mean none exist. You could use the built in Apple Calibrator and not alter anything and it will create a profile but the value of that profile is iffy at best and of course, no instruments. You can measure the display prior to the first calibration with a number of products but I don't know any that will then create a profile. Begging the question, why do you need a profile, can you just start with measurements of white point, cd/m^2 etc? BableColor CT&A should allow you to measure that display but not produce a profile.
You may wish to ask on the Apple ColorSync list. Again, it is possible there's some software that will bypass any calibration and produce a profile of the 'native' state but I know of none.