Chop chocolate finely and place in a plastic bowl. Melt the chocolate in the microwave using 30 seconds intervals.
Heat raspberry puree and glucose syrup till just begins to simmer. Do not boil.
Pour the warm mixture over the chocolate in 3 parts, mixing always with the help of a rubber spatula, fast and pressing down.
Pour it into deep container, and emulsify with a hand blender
Add unsalted butter room temperature and emulsify again.
Transfer mixture to a glass bowl and cover with plastic wrap to contact. Let set for at least 8- 10 hours (overnight).
Transfer to pipping bag and fill macarons shells.