macOS Catalina has a feature where you can use your iPad as a secondary display for your Mac. I have a Macbook Pro 2016 and a 10.5 inch iPad Pro 2017. Both are officially supported for the latest versions of macOS and iPadOS and support Sidecar.

I installed the latest version of iPadOS and macOS and tried using Sidecar and it kinda works but it's extremely laggy and blurry and almost unusable and if I turn wifi off in my mac it disconnects and complains about wifi being turned off.

As far as I know this feature can work with wired connections as well and I tried connecting iPad to Macbook using a (Lightning -> USB A) to USB C adapter and also also tried using a USB 3 hub connected directly to the laptop using USB C and it still does not work.

Is there any way I could force Sidecar to work over a wired connection?

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    Did you try a direct Mac-iPad connection (without any adapters or hubs)? – nohillside Aug 1 at 9:31
  • @nohillside I don't have a Lightning to USB C cable. My USB C hub is actually part of the monitor stand and connects to the laptop with a DisplayPort over TB3 connection. – Vahid Amiri Aug 1 at 9:35

You can use a direct USB-C to Lightning cable (I used an MFi cable by Aukey). Turn off the iPad's wifi, make sure you are signed in to the same apple ID, have iOS13 and Catalina installed. It is much faster than the wifi connection for me (and I also have less lag on my mac this way).

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