Can't use CMD+SHIFT+Drag to copy on Mac

Confirmed. This is an issue on macOS only, as this function works in Windows and on Linux. This was broken with 8a28bd8, specifically with the changes to Score::dragEnterEvent(). For some reason, on macOS, event->possibleActions() & Qt::CopyAction evaluates to false, even though event->dropAction() == Qt::CopyAction, so event->accept() is never called. I have a fix for this, which can be found here: https://github.com/musescore/MuseScore/pull/5433.

Fixed in branch master, commit 48a2591bc3

_fix #296127: Can't use CMD+SHIFT+Drag to copy on Mac

Resolves: https://musescore.org/en/node/296127.

ScoreView::dragEnterEvent() must call event->accept() if event->dropAction() == Qt::CopyAction, even if for some reason (event->possibleActions() & Qt::CopyAction) evaluates to false, as is the case on macOS._

Fixed in branch master, commit 1f563d32f1

_Merge pull request #5433 from mattmcclinch/296127-cmd-shift-drag

fix #296127: Can't use CMD+SHIFT+Drag to copy on Mac_

Fixed in branch 3.3, commit 7a239cbcd9

_Merge pull request #5433 from mattmcclinch/296127-cmd-shift-drag

fix #296127: Can't use CMD+SHIFT+Drag to copy on Mac_

Automatically closed -- issue fixed for 2 weeks with no activity.