Macarons are a luxurious treat, but their price tag makes proper storage essential to avoid waste. As someone who's tested these methods personally, I can share reliable advice from a seasoned professional.
Whether you pick up macarons from the supermarket, luxury spots like Pierre Hermé or Ladurée, Leonidas, Baillardran, or bake them at home, these tips will help maintain their delicate texture and taste.

Florence, a sales associate at Gérard Mulot with over 8 years of experience, shared these proven techniques. Gérard Mulot is a respected pastry chef known for exceptional handmade macarons—far superior to mass-produced options.
Here are Florence's two key tips to keep macarons from softening:

The optimal way to extend macaron freshness is refrigeration, as Florence recommends. Avoid leaving them at room temperature.
Place them in the central part of the fridge—the middle shelves—where the temperature stays consistently between 4 and 6°C.

Once positioned correctly, use an airtight container like Tupperware. This seals in flavors and blocks fridge odors from affecting the taste.
The original presentation box works well too, allowing for an elegant serve straight from storage.

For peak flavor, take macarons out 1 hour before enjoying. This allows them to reach ideal serving temperature, releasing aromas from flavors like chocolate, pistachio, raspberry, lemon, almond, coffee, and caramel.

Stored in an airtight container in the fridge's central zone, macarons stay fresh for up to 1 week without losing taste or texture.
I've put Florence's methods to the test, and they deliver—even after a full week, the macarons remained delectable.