I have a macbook pro and a mac pro.
My MacBook Pro is editing a heavier project, and I want to copy something from another project without reloading vst instruments between projects.
I use my Mac Pro to open the smaller project, selected something, copied to clipboard, and then went back to my MacBook Pro, tried to paste but found nothing pasted.
P.S.: I followed the instructions regarding macOS Universal Clipboard here:
https://support.apple.com/en-us/HT209460