Earlier this year at WWDC19 Apple confirmed app developers could take their current iPad apps, & turn them into fully fledged macOS apps using Mac Catalysts. Below is a list of apps that have released Mac apps using Catalysts.

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MoneyCoach

Carrot Weather

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Planny 3

Allegory

Dice

Crew

We will publish more apps that we find updated using catalysts. Make sure you check out our quick tips section.