5 Reasons to Buy a Monitor Instead of Relying on Sidecar

Sidecar has strict compatibility requirements Both Macs must be signed into the same Apple ID, on the same network, and running recent macOS versions. The MacBook Air must be Apple Silicon or a 2016–2019 Intel model with Sidecar support. An M-series Mac mini paired with an older Intel MacBook Air may not work at all.

Latency is noticeable Dragging windows and watching video feel sluggish. Even third-party apps like Luna Display or Duet Display introduce lag compared to a real monitor.

It locks up your laptop While acting as a display, you cannot use the MacBook Air as a laptop. It becomes a dedicated screen, limiting its portability.

A basic monitor is cheap and fast A 24-inch monitor costs around $150. It offers zero latency, simpler setup, and no compatibility headaches.

Your Mac mini deserves a proper monitor If you plan to use a second screen daily, a real monitor frees your MacBook Air for actual portable use. Sidecar is fine for occasional tasks, but not a permanent solution.