> Sidecar keeps falling off
Why is my iPad Pro’s Sidecar connection so unreliable that it disconnects when in use?
In most cases, connecting an iPad to a Mac using Sidecar just works, but when it doesn’t it can prove tricky to fix. Wireless Sidecar connections rely on good Wi–Fi and Bluetooth signals, which limits the distance between the iPad and Mac to a maximum of about 11 yards of uninterrupted sight, and works best when they’re closer. Neither can be sharing their internet connection, and both should be running the latest version of iPadOS/macOS. Anything causing interference or interruption to wireless transmission can break this. Domestic appliances such as microwave ovens, poorly shielded USB, or Thunderbolt cables or hubs are common culprits. Sometimes reconfiguring a Wi–Fi router to use different channels can free others for use by Sidecar’s connection.
Monitoring Wi–Fi and Bluetooth signals using an app like iStumbler reveals dropouts which result in disconnection. Those could occur from interference, or if either the Mac or iPad have a hardware problem.