Macadamia Wallet has introduced a new iMessage extension for Bitcoin payments, allowing Apple users to send Bitcoin directly through the Messages app. Released on September 23, 2025, this feature is part of version 0.4.0 of the Cashu-based Lightning wallet. The development comes after a U.S. court ruling in May 2025 mandated Apple to permit external crypto payment links in apps. With Apple's vast user base of 1.56 billion iPhone users, even minimal adoption of this feature could significantly influence Bitcoin's next adoption wave. The integration utilizes Apple's iMessage framework, potentially positioning it alongside popular payment platforms like Venmo and Apple Pay.