To my knowledge there is no In App (Program) interface scaling in CS 6. But there is interface scaling in Windows. that might work for you.Otherwise you would need to upgrade to the CC Photographer plan.
Excellent solution! This procedure also worked on other Adobe Creative Suite 6 apps: Illustrator, Dreamweaver, Bridge and non-Adobe product AutoCAD LT 2014 (may work work on other programs with the problem too!). Also not note that I found the Adobe CS6 Suite executables under both C:\Program Files (386x)\Adobe and C:\Program Files\Adobe\. This "duplication" of file may be related to whether the 64 bit version of the program is used or not. I also selected "System (enhanced) instead of just system for that particular step. Great job! Thank you!
Just as long as you understand that this scales the image along with the UI - in other words, it turns your expensive high-resolution screen into an ordinary standard screen. You could have saved the money.
The high density screen support that came with one of the CC versions (can't recall which) keeps the high resolution in the image window, while scaling the UI only.
CS6 is ten years old and high resolution screens didn't exist then.