Best-selling system based on commercial sales data from indirect B2B resellers in the United States for PC laptops in the same price range from January 2020 to April 2021. Testing conducted by Apple in May 2021 using production MacBook Air systems with Apple M1 chip, 7-core GPU, and macOS Big Sur, as well as production Intel Core i5-based PC systems with Intel Iris Xe Graphics and the latest version of Windows 10 available at the time of testing.Performance tests are conducted using specific computer systems and reflect the approximate performance of MacBook Air. Tested with prerelease Final Cut Pro 10.5 using a 55-second clip with 4K Apple ProRes RAW media, at 4096x2160 resolution and 59.94 frames per second, transcoded to Apple ProRes 422. Testing conducted by Apple in October 2020 using preproduction MacBook Air systems with Apple M1 chip and 8-core GPU, as well as production 1.2GHz quad-core Intel Core i7-based MacBook Air systems, all configured with 16GB RAM and 2TB SSD.