MacOs 27 Terminal.app changes default to disable accents popup.
After upgrading to Golden Gate, the Terminal.app no longer provides accent input popup by press-and-hold accentable keys.
This used to work in earlier versions.
The Global option ("defaults write -g ApplePressAndHoldEnabled -bool true") DOES NOT (or rather no longer) affect Terminal.app.
To Enable accent popup in Terminal.app, it is necessary to write:
defaults write com.apple.Terminal ApplePressAndHoldEnabled -bool true
This was annoying to debug, as there was no explicit "false" setting present in the com.apple.Terminal preference database that would have indicated that Terminal now overrides the Global setting.