MacBook Neo was built from the ground up to be Apple’s lowest-carbon MacBook, and brings the company even closer to reaching its ambitious plan to be carbon neutral across its entire footprint by 2030. It features 60 percent recycled content — the highest percentage of any Apple product.8 This includes 90 percent recycled aluminum overall and 100 percent recycled cobalt in the battery. The enclosure is manufactured with a material-efficient forming process that uses 50 percent less aluminum compared to traditional machining methods. MacBook Neo is manufactured with 45 percent renewable electricity, like wind and solar, across the supply chain. It also meets Apple’s high standards for energy efficiency and safe chemistry. Additionally, the paper packaging is 100 percent fiber-based and can be easily recycled.9
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Testing was conducted by Apple in January and February 2026 using preproduction MacBook Neo systems with Apple A18 Pro, 6-core CPU, 5-core GPU, 8GB of unified memory, and 256GB SSD, as well as production Intel Core Ultra 5-based PC systems with Intel Graphics, 8GB of RAM, 256GB SSD, and the latest version of Windows 11 Home available at the time of testing. Bestselling PC laptop with the latest shipping Intel Core Ultra 5 processor is based on publicly available sales data over the prior six months. Adobe Photoshop 2026 27.3.0 tested using the following filters and functions: super zoom, depth blur, JPEG artifact removal, style transfer, photo restoration, and landscape mixer. Performance tests are conducted using specific computer systems and reflect the approximate performance of MacBook Neo.
You can only use an effect if somewhere up the call stack there is a place where that effect will be handled. In Java you need a catch around every throw, even if for runtime exceptions you can skirt around this slightly. In languages with async/await you must decorate a call to an async function with await, and the function you’re calling from must be async. Eventually up the call stack you’ll get to a call that adds the async work to a task queue, executor, or blocks waiting for it to complete. These are all examples of effect handlers for async programming. They provide the scheduling effects that the async code needs in order to run.