Apple Silicon or Intel-based Mac
macOS 10.15 (Catalina), 11.x (Big Sur) or macOS 12.x (Monterey)
Dedicated AMD or NVIDIA GPU or integrated Apple Silicon/Intel graphics card
A screen resolution of at least 1920x1080
Make sure to test the final composition on a system which is equal to the system which is used to run just:out. Depending on the CPU, GPU and storage system used for playout, you will be able to play more or less complex compositions. Because a composition plays well using composition:builder does not automatically also mean, that it will play well on air.