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Specifically, is it possible to install Mojave/Catalina's built-in Shuangpin keyboard layout in High Sierra?
Shuangpin is an input method that contains 5 keyboard layouts. There's one layout that I need (Xiaohe) in newer version of the input method, but I'm stuck at High Sierra.
I tried using Ukelele: File -> New From Current Input Source. It shows error:
Looks like it's failed to load a file. Where is this file located? Can I copy the file to High Sierra and enable the input method? Or are there any ways to use the newer input method on my old mac?