Question: what is the difference between 2-set korean and 3-set korean?
Answer: 2-Set Korean: Vowels are on the right side of the keyboard, and consonants on the left. This is the default input source for Hangul in macOS. 3-Set Korean: Supports 3-set Hangul input used with the Gong Byung-Woo keyboard layout. ... For example, the M key corresponds to “ㅁ” in Hangul.